Expurgate moribund cpt=t.

common/content/tabs.js

@@ -865,11 +865,6 @@ var Tabs = Module("tabs", {
                 { argCount: "0" });
         }
     },
-    completion: function () {
-        completion.addUrlCompleter("t",
-            "Open tabs",
-            completion.buffer);
-    },
     events: function () {
         let tabContainer = config.tabbrowser.mTabContainer;
         ["TabMove", "TabOpen", "TabClose"].forEach(function (event) {

common/locale/en-US/options.xml

@@ -502,7 +502,6 @@
             <dt>b</dt> <dd>Bookmarks</dd>
             <dt>h</dt> <dd>History</dd>
             <dt>S</dt> <dd>Search engine suggestions</dd>
-            <dt>t</dt> <dd>Open tabs</dd>
         </dl>
 
         <p>