Clean up <> settings on ex-wikipedia special wikis
Context: for historical reasons, a number of special wikis used to be categorized as Wikipedia wikis in wikimedia-config. These wikis are: arbcom_cswiki, arbcom_dewiki, arbcom_enwiki, arbcom_fiwiki, arbcom_nlwiki, arbcom_ruwiki, sysop_itwiki, wg_enwiki. This meant that if you used 'wikipedia' => $value for a config setting, that setting was applied not only to actual Wikipedia wikis, but also to the special wikis above. In T183549, those wikis have been moved out of the 'wikipedia' group and into the 'special' group. We also added explicit overrides to preserve the previous configuration, but this now needs to be cleaned up.
Request: the following config settings for components owned by the LPL team are affected by the above changes (full commented list in T183549#11020415):
- wgSpecialContributeSkinsEnabled
- wmgULSPosition
Please take a moment to determine whether it was intentional to set these values on special wikis. If so, or if you still think it would make sense to leave them enabled, we only need to remove TODO comments requesting further review (and reordering settings a bit). Otherwise, they should be unset. Please let me know if you have any questions or need help!
