None of this code can be reached any more, so it can all be removed

Fixed `scss/at-extend-no-missing-placeholder` style-lint error for projects.scss

See merge request gitlab-org/gitlab-ee!14707

Fixed `selector-max-compound-selectors` lint error

See merge request gitlab-org/gitlab-ee!14777

Mark mirrors as failed 1 hour after they started

See merge request gitlab-org/gitlab-ce!30999

CE port for Group bulk edit merge requests

See merge request gitlab-org/gitlab-ce!30569

Add bulk update sidebar to merge requests template
Add js to toggle sidebar
Fix bulk update button in issues template
Add specs for merge requests in bulk update service

Resolve "Bulk editing group issues only works with owner access level"

See merge request gitlab-org/gitlab-ee!14744

Cleaning up ee and ce separation inside one repo

Closes gitlab-ce#59964

See merge request gitlab-org/gitlab-ee!14686

Moved any specs that are ee to a specific folder inside spec folder.
Inside this folder the same structure was recreated as in the parent.
Any methods that where ee specific, where moved to the ee base folder.

Extra logging for new live trace architecture

See merge request gitlab-org/gitlab-ce!30892

Use persistent Redis cluster for Workhorse pub/sub notifications

See merge request gitlab-org/gitlab-ce!30990

Fix suggestion on lines that are not part of an MR

See merge request gitlab-org/gitlab-ce!30606

Enable Junit reports

Closes #64756

See merge request gitlab-org/gitlab-ce!30931

Make pipeline emails respect group email setting

Closes #63485

See merge request gitlab-org/gitlab-ce!30907

Remove :livesum from RubySampler metrics

See merge request gitlab-org/gitlab-ce!31047

We call `Project#mark_stuck_remote_mirrors_as_failed!` from the
`Git::BaseHooksService`. So that gets called every time we push tags
or branches.

Before this would only mark started mirrors as failed if they had
been started 24 hours ago. A push would never take 24 hours,
especially not when we run it so often.

Lowering that threshold 1 hour should at least allow us to retry
broken mirrors more often on pushes.

The timeout for the initial push is set somewhat longer to accommodate
for pushing large repos. Both numbers are currently picked arbitrarily.

Add index for issues on relative position, project, and state for manual sorting

See merge request gitlab-org/gitlab-ce!30542

Make Bootsnap available via ENABLE_BOOTSNAP=1

Closes #45230

See merge request gitlab-org/gitlab-ce!30963

Ensure test is on login page before attempting login

See merge request gitlab-org/gitlab-ce!31040

Resolve "Log impersonation actions in audit log"

See merge request gitlab-org/gitlab-ee!14740

CE Port: Log impersonation actions in audit log

See merge request gitlab-org/gitlab-ce!31039

Merge vulnerabilities data to Dependency List report

See merge request gitlab-org/gitlab-ee!14706

Rake task to cleanup expired ActiveSession lookup keys

See merge request gitlab-org/gitlab-ce!30668

Extend yamllint test to changelogs

See merge request gitlab-org/gitlab-ce!31017

cc !30979

Multiple pipeline support for Build status

See merge request gitlab-org/gitlab-ce!30828

Add better error message to MembersMapper#ensure_default_member!

See merge request gitlab-org/gitlab-ce!30838