chore: Remove CANDIDATE_VERSION check from regression tests (aws#10897)

This check breaks the release pipeline, and isn't _strictly_ necessary for the
master pipeline either.

chore(release): 1.67.0 (aws#10771)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.67.0/CHANGELOG.md)

chore(release): 1.66.0 (aws#10662)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.66.0/CHANGELOG.md)

chore(release): 1.65.0 (aws#10612)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.65.0/CHANGELOG.md)

chore(release): 1.64.1 (aws#10541)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/patch/v1.64.1/CHANGELOG.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Merge pull request aws#10469 from aws/bump/1.64.0

chore(release): 1.64.0

chore(release): 1.63.0 (aws#10318)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.63.0/CHANGELOG.md)

chore(release): 1.62.0 (aws#10159)

See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.62.0/CHANGELOG.md)

chore(release): 1.61.1 (aws#10034)

See CHANGELOG

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Merge pull request aws#10000 from aws/bump/1.61.0

chore(release): 1.61.0