Bug 387685: clean up Firefox tooltip code now that bug 279703 has landed (back out most of the patch for bug 218223), r=Enn (original SeaMonkey patch by Neil Rashbrook in bug 386390)

browser/themes/gnomestripe/browser/browser.css

@@ -1460,10 +1460,3 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   -moz-border-bottom-colors: #000000;
 }
 %endif
-
-/* ::::: Tooltips (multi-line) from content ::::: */
-.htmltooltip-label {
-  max-width: 40em;
-  margin: 0;
-  white-space: -moz-pre-wrap;
-}