We've been bad at cleaning up after ourselves. Please review all of these and remove any that are no longer relevant.
master x ~/git/core/extensions/MobileFrontend $ ag 'FIXME.*cache'
includes/Resources.php
40: FIXME: Remove when cache has cleared
717: FIXME: Remove after cache is cleared
resources/mobile.editor/init.js
128: FIXME: Clean up selector when cache has cleared.
222: FIXME: split the selector and cache it
resources/mobile.head/init.js
5: // FIXME: remove #mw-mf-main-menu-button when cache clears
resources/mobile.issues/init.js
99: // FIXME: Cleanup selector when cache has cleared
resources/mobile.mainMenu/icons.less
28:// FIXME: Remove when cache cleared
resources/mobile.mainMenu/MainMenu.js
96: // FIXME: Remove when cache clears https://phabricator.wikimedia.org/T102868
resources/mobile.references/init.js
54: // FIXME: Cleanup selector when cache clears
resources/mobile.startup/init.js
53: FIXME: Clean up when cache clears.
107: FIXME: Remove this once the cache has cleared. This is tracked by T101721.
resources/mobile.startup/panel.less
5:// FIXME: clean up selectors when cache clears
resources/mobile.startup/Skin.js
50: // FIXME: remove the ID comparison when cache clears
resources/mobile.talk/init.js
41: FIXME: Remove this after cache is cleared
73: FIXME: Cleanup selector when cache has cleared
resources/mobile.toggling/init.js
4: FIXME: Clean up when cache clears.
319: FIXME: remove when cache clears
resources/skins.minerva.base.styles/pageactions.less
16:// FIXME: remove the .stable .pre-content selector when cache clears
resources/skins.minerva.base.styles/ui.less
13:// FIXME: Remove content_wrapper when cache clears.
19:// FIXME: Rule resets #content rule and can be removed when cache cleared
24:// FIXME: REMOVE .stable .pre-content.last-modified-bar selector when cache clears
resources/skins.minerva.tablet.styles/common.less
15: FIXME: remove the .stable .pre-content selector when cache clears
21: FIXME: remove the .stable .pre-content selector when cache clears
113: FIXME: remove when cache clears
122: FIXME: remove when cache clears