warn on unneeded rules

Author: mvorisek

.stylelintrc.js

@@ -43,4 +43,5 @@ module.exports = {
         'color-hex-case': null, // 1 error
         'color-hex-length': null, // 1 error
     },
+    reportNeedlessDisables: true,
 };

src/themes/default/globals/colors.less

@@ -481,7 +481,7 @@
         bright         : @blackBright;
         brightHover    : @blackBrightHover;
         isDark         : true;
-        isVeryDark     : true; // stylelint-disable-line no-extra-semicolons, fix GH-1832 - workaround for wikimedia/less.php parser
+        isVeryDark     : true; // stylelint-disable-line no-extra-semicolons
     };
 };
 
@@ -613,7 +613,7 @@
     @success: { // stylelint-disable-line indentation
         color: @positiveColor;
     };
-    @warning: { // stylelint-disable-line no-extra-semicolons, fix GH-1832 - workaround for wikimedia/less.php parser, indentation
+    @warning: { // stylelint-disable-line no-extra-semicolons, indentation
         color: @warningColor;
     };
 };