Task for the sunsetting of Wikipedia Zero.
See also:
https://blog.wikimedia.org/2018/02/16/partnerships-new-approach/
https://medium.com/@refsrc/wikipedia-zero-which-provided-over-800-million-users-in-72-countries-with-access-to-wikipedia-at-ff3014a122e6
This includes:
[ ] Remove special Varnish VCL code for Zero support.
[ ] Phabricator hacks ([[ https://gerrit.wikimedia.org/r/479399 | patch ]])
[ ] Carrier tagging
[ ] …
[ ] Remove any other special code for Zero
[ ] Apache config ([[ https://gerrit.wikimedia.org/r/482492 | patch ]])
[ ] `mobilelanding.php`
[ ] …
[ ] Un-deploy MediaWiki extensions:
[ ] ZeroPortal
[ ] ZeroBanner
[ ] …
[ ] Delete zerowiki
[ ] How-To: Delete a wiki (mw config, mw db, multiversion, apache, dns)
[ ] …
[ ] Hard-redirect `.zero.` domains to `.m.` and create a plan for their deprecation
[ ] {T197528}