Bug 1366555 followup: Remove accidentally re-added code during rebase

MozReview-Commit-ID: L50ETijPr4r

browser/themes/shared/compacttheme.inc.css

@@ -139,16 +139,6 @@ toolbar[brighttext] .toolbarbutton-1 {
   list-style-image: url("chrome://browser/skin/back.svg");
 }
 
-.tabbrowser-tab:-moz-any([image], [pinned]) > .tab-stack > .tab-content[attention]:not([selected="true"]),
-.tabbrowser-tab > .tab-stack > .tab-content[pinned][titlechanged]:not([selected="true"]) {
-  background-position: center bottom -4px;
-}
-
-.tabbrowser-tab[image] > .tab-stack > .tab-content[attention]:not([pinned]):not([selected="true"]) {
-  background-position: left bottom var(--tab-toolbar-navbar-overlap);
-  background-size: 34px 100%;
-}
-
 .tab-throbber[selected][progress] {
   list-style-image: url("chrome://browser/skin/compacttheme/loading-inverted.png");
 }