Remove the store_designs_in_lfs feature flag
What does this MR do?
This MR removes the store_designs_in_lfs
feature flag from the codebase.
Issue https://gitlab.com/gitlab-org/gitlab-ee/issues/12158.
The feature flag was added in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13389.
This MR does not include a changelog entry, because the feature has been enabled by default since https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13389 and that MR contained the changelog.
Does this MR meet the acceptance criteria?
Conformity
- [-] Changelog entry
- [-] Documentation created/updated or follow-up review issue created
-
Code review guidelines -
Merge request performance guidelines -
Style guides - [-] Database guides
- [-] Separation of EE specific content