Remove feature flag for "Squash commits" feature [RUN ALL RSPEC] [RUN AS-IF-FOSS]
What does this MR do?
Removing squash_options feature flag from code
- It's been enabled by default for a while so it should be safe to remove at this point
Conformity
- Changelog entry
- Documentation (if required)
- Code review guidelines
- Merge request performance guidelines
- Style guides
- Database guides
- Separation of EE specific content
Availability and Testing
- Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
- Tested in all supported browsers
- Informed Infrastructure department of a default or new setting change, if applicable per definition of done
Closes #297016