Bug 1531101 - Get rid of some dead CSS in videocontrols.css. r=jaws

Differential Revision: https://phabricator.services.mozilla.com/D22162

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

toolkit/themes/shared/media/videocontrols.css

@@ -466,12 +466,6 @@
   display: none;
 }
 
-[error="errorAborted"]         > [anonid="errorAborted"],
-[error="errorNetwork"]         > [anonid="errorNetwork"],
-[error="errorDecode"]          > [anonid="errorDecode"],
-[error="errorSrcNotSupported"] > [anonid="errorSrcNotSupported"],
-[error="errorNoSource"]        > [anonid="errorNoSource"],
-[error="errorGeneric"]         > [anonid="errorGeneric"],
 [error="errorAborted"]         > [id="errorAborted"],
 [error="errorNetwork"]         > [id="errorNetwork"],
 [error="errorDecode"]          > [id="errorDecode"],