Last modified: 2012-12-31 15:19:08 UTC
One is $wgUseTeX. The only usage left is EditPage.php and it can be a bug to show 'Input math' button when $wgUseTeX is set but Extension:Math is not installed. Another is LanguageConverter::armourMath(). Maybe it can be just rename to LanguageConverter::escapeConversionTag().