Per consensus on https://ms.wikipedia.org/w/index.php?title=Wikipedia:Kedai_Kopi_(dasar)&oldid=3832009#Wikimedia_Commons (only people in favour of the proposal), please set $wgEnableUploads = false on the Malay Wikipedia, with $wgUploadNavigationUrl = '//commons.wikimedia.org/wiki/Special:UploadWizard'.
https://ms.wikipedia.org/w/index.php?title=Wikipedia%3AKedai_Kopi_%28dasar%29&type=revision&diff=3848028&oldid=3847943 confirmed that they want $wgEnableUploads = false so that admins can't upload either.
File uploads are now totally disabled locally as requested. It is however worth noting that people will still have upload rights as appears on Special:ListGroupRights, however if they access Special:Upload, an error message will appear even for them. Maybe those should be removed at all wikis with uploads fully disabled to avoid confusion. Thanks.