Remove broken custom code in DifferentialRevisionSearchEngine.php
Reverts rPHABdd7856c0e116f19acfbea62babceb409f00a3d33.
Bug: T351957
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
Reverts rPHABdd7856c0e116f19acfbea62babceb409f00a3d33.
Bug: T351957