Issue:
Bug: chore: resolve v2 warnings in api_models



Resolve all v2 warnings in api_models crate.

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
This PR resolves the v2 warnings generated in api_models.


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->


## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->


## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

Patch:
diff --git a/crates/api_models/src/admin.rs b/crates/api_models/src/admin.rs
index ae66147b104..ffbbdeb351e 100644
--- a/crates/api_models/src/admin.rs
+++ b/crates/api_models/src/admin.rs
@@ -14,7 +14,6 @@ use common_utils::{crypto::OptionalEncryptableName, ext_traits::ValueExt};
 use masking::ExposeInterface;
 use masking::{PeekInterface, Secret};
 use serde::{Deserialize, Serialize};
-use url;
 use utoipa::ToSchema;
 
 use super::payments::AddressDetails;
diff --git a/crates/api_models/src/events/payment.rs b/crates/api_models/src/events/payment.rs
index a6b2c53d282..76d1201c2e7 100644
--- a/crates/api_models/src/events/payment.rs
+++ b/crates/api_models/src/events/payment.rs
@@ -5,34 +5,28 @@ use super::{
     PaymentStartRedirectionRequest, PaymentsCreateIntentRequest, PaymentsGetIntentRequest,
     PaymentsIntentResponse, PaymentsRequest,
 };
-#[cfg(all(
-    any(feature = "v2", feature = "v1"),
-    not(feature = "payment_methods_v2")
-))]
-use crate::payment_methods::CustomerPaymentMethodsListResponse;
 #[cfg(feature = "v1")]
-use crate::payments::{PaymentListFilterConstraints, PaymentListResponseV2};
-#[cfg(all(feature = "v2", feature = "payment_methods_v2"))]
-use crate::{events, payment_methods::CustomerPaymentMethodsListResponse};
+use crate::payments::{
+    ExtendedCardInfoResponse, PaymentIdType, PaymentListFilterConstraints, PaymentListResponseV2,
+    PaymentsApproveRequest, PaymentsCancelRequest, PaymentsCaptureRequest,
+    PaymentsCompleteAuthorizeRequest, PaymentsDynamicTaxCalculationRequest,
+    PaymentsDynamicTaxCalculationResponse, PaymentsExternalAuthenticationRequest,
+    PaymentsExternalAuthenticationResponse, PaymentsIncrementalAuthorizationRequest,
+    PaymentsManualUpdateRequest, PaymentsManualUpdateResponse, PaymentsPostSessionTokensRequest,
+    PaymentsPostSessionTokensResponse, PaymentsRejectRequest, PaymentsRetrieveRequest,
+    PaymentsStartRequest, PaymentsUpdateMetadataRequest, PaymentsUpdateMetadataResponse,
+};
 use crate::{
     payment_methods::{
         self, ListCountriesCurrenciesRequest, ListCountriesCurrenciesResponse,
         PaymentMethodCollectLinkRenderRequest, PaymentMethodCollectLinkRequest,
-        PaymentMethodCollectLinkResponse, PaymentMethodDeleteResponse, PaymentMethodListRequest,
-        PaymentMethodListResponse, PaymentMethodMigrateResponse, PaymentMethodResponse,
-        PaymentMethodUpdate,
+        PaymentMethodCollectLinkResponse, PaymentMethodListRequest, PaymentMethodListResponse,
+        PaymentMethodMigrateResponse, PaymentMethodResponse, PaymentMethodUpdate,
     },
     payments::{
-        self, ExtendedCardInfoResponse, PaymentIdType, PaymentListConstraints, PaymentListFilters,
-        PaymentListFiltersV2, PaymentListResponse, PaymentsAggregateResponse,
-        PaymentsApproveRequest, PaymentsCancelRequest, PaymentsCaptureRequest,
-        PaymentsCompleteAuthorizeRequest, PaymentsDynamicTaxCalculationRequest,
-        PaymentsDynamicTaxCalculationResponse, PaymentsExternalAuthenticationRequest,
-        PaymentsExternalAuthenticationResponse, PaymentsIncrementalAuthorizationRequest,
-        PaymentsManualUpdateRequest, PaymentsManualUpdateResponse,
-        PaymentsPostSessionTokensRequest, PaymentsPostSessionTokensResponse, PaymentsRejectRequest,
-        PaymentsRetrieveRequest, PaymentsSessionResponse, PaymentsStartRequest,
-        PaymentsUpdateMetadataRequest, PaymentsUpdateMetadataResponse, RedirectionResponse,
+        self, PaymentListConstraints, PaymentListFilters, PaymentListFiltersV2,
+        PaymentListResponse, PaymentsAggregateResponse, PaymentsSessionResponse,
+        RedirectionResponse,
     },
 };
 
@@ -272,7 +266,7 @@ impl ApiEventMetric for payment_methods::DefaultPaymentMethod {
 }
 
 #[cfg(feature = "v2")]
-impl ApiEventMetric for PaymentMethodDeleteResponse {
+impl ApiEventMetric for payment_methods::PaymentMethodDeleteResponse {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
         Some(ApiEventsType::PaymentMethod {
             payment_method_id: self.id.clone(),
@@ -283,7 +277,7 @@ impl ApiEventMetric for PaymentMethodDeleteResponse {
 }
 
 #[cfg(feature = "v1")]
-impl ApiEventMetric for PaymentMethodDeleteResponse {
+impl ApiEventMetric for payment_methods::PaymentMethodDeleteResponse {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
         Some(ApiEventsType::PaymentMethod {
             payment_method_id: self.payment_method_id.clone(),
@@ -293,7 +287,7 @@ impl ApiEventMetric for PaymentMethodDeleteResponse {
     }
 }
 
-impl ApiEventMetric for CustomerPaymentMethodsListResponse {}
+impl ApiEventMetric for payment_methods::CustomerPaymentMethodsListResponse {}
 
 impl ApiEventMetric for PaymentMethodListRequest {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
diff --git a/crates/api_models/src/events/refund.rs b/crates/api_models/src/events/refund.rs
index 888918d836e..14e1984a760 100644
--- a/crates/api_models/src/events/refund.rs
+++ b/crates/api_models/src/events/refund.rs
@@ -1,13 +1,12 @@
 use common_utils::events::{ApiEventMetric, ApiEventsType};
 
+use crate::refunds::{
+    self, RefundAggregateResponse, RefundListFilters, RefundListMetaData, RefundListRequest,
+    RefundListResponse,
+};
 #[cfg(feature = "v1")]
-use crate::refunds::RefundRequest;
-#[cfg(feature = "v2")]
-use crate::refunds::RefundsCreateRequest;
 use crate::refunds::{
-    RefundAggregateResponse, RefundListFilters, RefundListMetaData, RefundListRequest,
-    RefundListResponse, RefundManualUpdateRequest, RefundResponse, RefundUpdateRequest,
-    RefundsRetrieveRequest,
+    RefundManualUpdateRequest, RefundRequest, RefundUpdateRequest, RefundsRetrieveRequest,
 };
 
 #[cfg(feature = "v1")]
@@ -24,14 +23,14 @@ impl ApiEventMetric for RefundRequest {
 }
 
 #[cfg(feature = "v2")]
-impl ApiEventMetric for RefundsCreateRequest {
+impl ApiEventMetric for refunds::RefundsCreateRequest {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
         None
     }
 }
 
 #[cfg(feature = "v1")]
-impl ApiEventMetric for RefundResponse {
+impl ApiEventMetric for refunds::RefundResponse {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
         Some(ApiEventsType::Refund {
             payment_id: Some(self.payment_id.clone()),
@@ -41,7 +40,7 @@ impl ApiEventMetric for RefundResponse {
 }
 
 #[cfg(feature = "v2")]
-impl ApiEventMetric for RefundResponse {
+impl ApiEventMetric for refunds::RefundResponse {
     fn get_api_event_type(&self) -> Option<ApiEventsType> {
         Some(ApiEventsType::Refund {
             payment_id: self.payment_id.clone(),
diff --git a/crates/api_models/src/payment_methods.rs b/crates/api_models/src/payment_methods.rs
index 4313d224019..0f53776e644 100644
--- a/crates/api_models/src/payment_methods.rs
+++ b/crates/api_models/src/payment_methods.rs
@@ -3,18 +3,16 @@ use std::collections::{HashMap, HashSet};
 use std::str::FromStr;
 
 use cards::CardNumber;
+#[cfg(feature = "v1")]
+use common_utils::crypto::OptionalEncryptableName;
 use common_utils::{
     consts::SURCHARGE_PERCENTAGE_PRECISION_LENGTH,
-    crypto::OptionalEncryptableName,
     errors,
     ext_traits::OptionExt,
     id_type, link_utils, pii,
     types::{MinorUnit, Percentage, Surcharge},
 };
-#[cfg(all(any(feature = "v1", feature = "v2"), not(feature = "customer_v2")))]
 use masking::PeekInterface;
-#[cfg(all(feature = "v2", feature = "payment_methods_v2"))]
-use masking::{ExposeInterface, PeekInterface};
 use serde::de;
 use utoipa::{schema, ToSchema};
 
@@ -2430,6 +2428,10 @@ pub enum MigrationStatus {
     Failed,
 }
 
+#[cfg(all(
+    any(feature = "v2", feature = "v1"),
+    not(feature = "payment_methods_v2")
+))]
 type PaymentMethodMigrationResponseType = (
     Result<PaymentMethodMigrateResponse, String>,
     PaymentMethodRecord,
diff --git a/crates/api_models/src/payments.rs b/crates/api_models/src/payments.rs
index 011fd7e4431..29b0c050b67 100644
--- a/crates/api_models/src/payments.rs
+++ b/crates/api_models/src/payments.rs
@@ -1,6 +1,7 @@
+#[cfg(feature = "v1")]
+use std::fmt;
 use std::{
     collections::{HashMap, HashSet},
-    fmt,
     num::NonZeroI64,
 };
 pub mod additional_info;
@@ -9,6 +10,7 @@ use cards::CardNumber;
 #[cfg(feature = "v2")]
 use common_enums::enums::PaymentConnectorTransmission;
 use common_enums::ProductType;
+#[cfg(feature = "v1")]
 use common_types::primitive_wrappers::{
     ExtendedAuthorizationAppliedBool, RequestExtendedAuthorizationBool,
 };
@@ -25,24 +27,25 @@ use common_utils::{
 use error_stack::ResultExt;
 use masking::{PeekInterface, Secret, WithType};
 use router_derive::Setter;
-use serde::{de, ser::Serializer, Deserialize, Deserializer, Serialize};
+#[cfg(feature = "v1")]
+use serde::{de, Deserializer};
+use serde::{ser::Serializer, Deserialize, Serialize};
 use strum::Display;
 use time::{Date, PrimitiveDateTime};
 use url::Url;
 use utoipa::ToSchema;
 
-#[cfg(feature = "v1")]
-use crate::ephemeral_key::EphemeralKeyCreateResponse;
 #[cfg(feature = "v2")]
-use crate::mandates::ProcessorPaymentToken;
+use crate::mandates;
 #[cfg(feature = "v2")]
 use crate::payment_methods;
 use crate::{
     admin::{self, MerchantConnectorInfo},
-    disputes, enums as api_enums,
+    enums as api_enums,
     mandates::RecurringDetails,
-    refunds, ValidateFieldAndGet,
 };
+#[cfg(feature = "v1")]
+use crate::{disputes, ephemeral_key::EphemeralKeyCreateResponse, refunds, ValidateFieldAndGet};
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum PaymentOp {
@@ -5304,7 +5307,7 @@ pub struct ProxyPaymentsRequest {
 
     pub amount: AmountDetails,
 
-    pub recurring_details: ProcessorPaymentToken,
+    pub recurring_details: mandates::ProcessorPaymentToken,
 
     pub shipping: Option<Address>,
 
@@ -7779,6 +7782,7 @@ mod payment_id_type {
         deserializer.deserialize_any(PaymentIdVisitor)
     }
 
+    #[allow(dead_code)]
     pub(crate) fn deserialize_option<'a, D>(
         deserializer: D,
     ) -> Result<Option<PaymentIdType>, D::Error>
@@ -8576,8 +8580,8 @@ impl PaymentRevenueRecoveryMetadata {
     ) {
         self.payment_connector_transmission = Some(payment_connector_transmission);
     }
-    pub fn get_payment_token_for_api_request(&self) -> ProcessorPaymentToken {
-        ProcessorPaymentToken {
+    pub fn get_payment_token_for_api_request(&self) -> mandates::ProcessorPaymentToken {
+        mandates::ProcessorPaymentToken {
             processor_payment_token: self
                 .billing_connector_payment_details
                 .payment_processor_token