removed handling two data types from API

[alhss]

related to : https://github.com/github/dependabot-api/pull/7404

What are you trying to accomplish?

Since i removed the above feature flag and made the array of objects the default data format there's no need to keep both handling both data formats.

Anything you want to highlight for special attention from reviewers?

How will you know you've accomplished your goal?

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[alhss]

i'm thinking about leaving the function as it is because a lot of tests depends on the older format