diff --git a/mozilla/themes/classic/navigator/tabbrowser.css b/mozilla/themes/classic/navigator/tabbrowser.css
deleted file mode 100644
index 522cf129bb3..00000000000
--- a/mozilla/themes/classic/navigator/tabbrowser.css
+++ /dev/null
@@ -1,85 +0,0 @@
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-
-.tabbrowser-strip {
-  padding-bottom: 3px;
-  border-bottom: 2px solid;
-  -moz-border-bottom-colors: ThreeDDarkShadow ThreeDShadow;
-}
-
-tabpanels {
-  -moz-appearance: none;
-}
-
-.tabbrowser-tabs {
-  padding-top: 1px;
-}
-
-.tabs-left,
-.tabs-right {
-  width: 3px;
-}
-
-.tabs-bottom {
-  -moz-appearance: tabpanels;
-  height: 4px;
-}
-
-.tabs-stack {
-  border-bottom: 1px solid;
-  -moz-border-bottom-colors: ThreeDShadow;
-}
-
-.tabs-bottom-spacer {
-  height: 2px;
-}
-
-.tab-icon {
-  margin-top: 1px;
-  margin-right: 3px;
-  width: 16px;
-  height: 16px;
-}
-
-tab {
-  list-style-image: url("chrome://communicator/skin/bookmarks/bookmark-item.png"); 
-}
-
-tab[busy] {
-  list-style-image: url("chrome://communicator/skin/icons/loading.gif");
-}
-
-/* ::::: close button ::::: */
-
-.tabs-closebutton {
-  margin: 3px;
-  list-style-image: url("chrome://communicator/skin/icons/close-button.gif");
-}
-
-.tabs-closebutton > .toolbarbutton-icon {
-  margin: 0;
-}
-
-.tabs-newbutton {
-  margin: 0px;
-  list-style-image: url("chrome://navigator/skin/icons/tab-new.gif");
-}
-
-.tab-drop-indicator-bar {
-    height: 11px;
-    margin-top: -11px;
-    margin-left: -8px;
-    position: relative;
-}
-
-.tab-drop-indicator {
-    height: 11px;
-    width: 11px;
-    margin-bottom: -5px;
-    position: relative;
-    list-style-image: url('chrome://navigator/skin/icons/tab-drag-indicator.gif');
-}
-
-tooltip[tabpreview="true"] {
-  max-width: none;
-}