move autocomplete hack into toolkit's xul.css under a moz_thunderbird ifdef.

mail/components/compose/skin/messengercompose.css

@@ -29,47 +29,6 @@
 
 @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
 
-/**** BEGIN HACK: thunderbird does not currently use the new toolkit's autocomplete widget...so
-      for now, force the bindings back to the old values in the xpfe toolkit ******/
-
-textbox[type="autocomplete"] {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete");
-}
-
-.autocomplete-result-popup {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete-result-popup");
-}
-
-.autocomplete-history-popup {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete-history-popup");
-}
-
-.autocomplete-tree {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete-tree");
-}
-
-.autocomplete-treebody {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete-treebody");
-}
-
-.autocomplete-treerows {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#autocomplete-treerows");
-}
-
-.autocomplete-history-dropmarker {
-  -moz-binding: url("chrome://global/content/autocomplete.xml#history-dropmarker");
-}
-
-.autocomplete-treebody:-moz-tree-row(menuactive) {
-  background-color: Highlight;
-}
-
-.autocomplete-treebody:-moz-tree-cell-text(menuactive)  {
-  color: HighlightText !important;
-}
-
-/*** end horrible hack ***/
-
 /* ::::: primary toolbar buttons ::::: */
  
 .toolbarbutton-1 {