[Feature flag] Remove `sec_dependency_scanning_ui_enable` Feature Flag

release notes gitlab-com/www-gitlab-com!85841 (merged)

What

Remove the sec_dependency_scanning_ui_enable Feature Flag feature flag

Owners

• Team: groupcomposition analysis
• Most appropriate slack channel to reach out to: #g_secure-composition-analysis
• Best individual to reach out to: @pgascouvaillancourt @jannik_lehmann

Expectations

What are we expecting to happen?

What might happen if this goes wrong?

What can we monitor to detect problems with this?

Implementation plan

• Remove feature flag
• After the flag removal is deployed, clean up the feature flag by running chatops command in #production channel