Remove cherry-picking page from left nav

Remove navigation item from global navigation

In Combine cherry-pick pages and redirect one (gitlab!144682 - merged), I'm combining and redirecting a page. Let's get it out of the left nav:

• Removing: https://docs.gitlab.com/ee/topics/git/cherry_picking.html
• Redirecting to: https://docs.gitlab.com/ee/user/project/merge_requests/cherry_pick_changes.html (already exists)

Related links

• Related to Combine cherry-pick pages and redirect one (gitlab!144682 - merged)
• Related to Docs: revert/cherry-pick squashed MRs with FF s... (gitlab#439097 - closed)
• Related to Enable cherry-picking for fast-forward commits,... (gitlab#22236 - closed)