Chore/82407366 remove active resource

These might be easier to read if they were Ruby objects that got `#to_json` called on them, like:
```ruby
let(:response) { [ { id: deployment_id } ].to_json }
```

Or even had a
```ruby
let(:response_json) { response.to_json }
```
at the top of the spec that you used in all the `stub_request` calls, although that requires some jumping around to understand.