Remove unneeded check for CoreSchema or CoreSchemaField in handler_func in GenerateJsonSchema.generate_inner

[candleindark]

Change Summary

This PR removes the check for CoreSchema or CoreSchemaField in handler_func in GenerateJsonSchema.generate_inner. The check is always true.

This PR is not what is needed if the code before the change in this PR doesn't implement what is intended.

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @samuelcolvin

[codspeed-hq]

CodSpeed Performance Report

Merging #9454 will not alter performance

_{Comparing candleindark:remove-unneeded-check (aad4779) with main (15b82a9)}

Summary

✅ 13 untouched benchmarks

[candleindark]

Please review.

[sydney-runkle]

Hmm,

Though removing this check doesn't break any tests, I'd like to keep this as a support mechanism for folks who are customizing the JSON schema generation process. Thanks for your contribution though - we'd love to have your help with other issues, if you're interested!