[Validator] Removed duplicated test for IBAN in data provider
minor #9851 [Validator] Removed duplicated test for IBAN in data provider (stewe)

This PR was merged into the 2.3 branch.

Discussion
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[Validator] Removed duplicated test for IBAN in data provider

Working on #9850, I spotted a duplicated value on `getValidIbans` data provider and I just removed the duplicated value.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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35610d0 [Validator] Removed duplicated test for IBAN in data provider