Remove composer requirement to prevent PHP MAX tests from crashing

Removed the unneeded require section from module's composer.json and since merge request MR!48 passed all tests, it was merged above at #4 into the 2.0.x branch.

Pipeline for the 2.0.x is now back to green 🟢
See: https://git.drupalcode.org/project/block_class/-/pipelines/249348
phpunit (max PHP version): https://git.drupalcode.org/project/block_class/-/jobs/2397564

Important: 2.0.x and 3.0.x now have the same version requirements.
The composer.json from both branches are now the same.
Dependencies are resolved in both cases based on module's core_version_requirement: ^9 || ^10 || ^11 in the block_class.info.yml file.
The job phpunit (max PHP version) is now using the same versions and dependencies to run the tests in both branches.
 

Marking issue as Fixed for now, since all the work expected should have been completed at this point.

Feel free to let us know if you have any questions or concerns on any aspects of these changes or the project in general, we would surely be glad to help.
Thanks in advance for your feedback, reviews and comments!

Automatically closed - issue fixed for 2 weeks with no activity.