Add the PUSH_RULES removal for real this time

When we can start publishing for the 15.0 release, this removal notification should be re-added to the removals page. Right now it's still too early.

DON'T PERPETUATE THE CYCLE. WAIT FOR %15.0 TO MERGE, NO MATTER HOW GREEN THE PIPELINE IS!

Related merge requests containing sadness

• Removal notice for rerequest review (!84007 - merged) where we originally posted it
• Remove announcement from Source Code (!84524 - merged) where we reverted it
• Removal notice for rerequest review (!84007 - merged) where we did even more reverting! 🎉