Bug 1441837 - Remove unused --in-content-category-text-active variable. r=jaws

Differential Revision: https://phabricator.services.mozilla.com/D5966

--HG--
extra : moz-landing-system : lando

browser/base/content/test/static/browser_parsable_css.js

@@ -96,11 +96,6 @@ if (!Services.prefs.getBoolPref("layout.css.scrollbar-width.enabled")) {
 }
 
 let propNameWhitelist = [
-  // These are CSS custom properties that we found a definition of but
-  // no reference to.
-  // Bug 1441837
-  {propName: "--in-content-category-text-active",
-   isFromDevTools: false},
   // These custom properties are retrieved directly from CSSOM
   // in videocontrols.xml to get pre-defined style instead of computed
   // dimensions, which is why they are not referenced by CSS.

toolkit/themes/shared/in-content/common.inc.css

@@ -23,7 +23,6 @@
   --in-content-border-color: #d7d7db;
   --in-content-category-outline-focus: 1px dotted #0a84ff;
   --in-content-category-text: rgba(12,12,13);
-  --in-content-category-text-active: #0c0c0d;
   --in-content-category-text-selected: #0a84ff;
   --in-content-category-text-selected-active: #0060df;
   --in-content-category-background-hover: rgba(12,12,13,0.1);