REVERT r62231: Disable pings/trackbacks for local, development, and staging environments

Commits to trunk have been paused for 7.0.

See: https://make.wordpress.org/core/2026/04/02/the-path-forward-for-wordpress-7-0/

Props arcangelini, cagrimmett, ramonopoly, tyxla, ocean90, khushipatel15.

Follow-up to [64837].

See #64837.



git-svn-id: https://develop.svn.wordpress.org/trunk@62233 602fd350-edb4-49c9-b593-d223f7449a82