Bug 986769 - remove character encoding view's call to addShortcut entirely, r=jaws

--HG--
extra : rebase_source : 22ac8e78d2574cbb0e2d85f747b5f71bd940ddd9

browser/components/customizableui/src/CustomizableWidgets.jsm

@@ -770,7 +770,6 @@ const CustomizableWidgets = [{
         elem.section = aSection;
         elem.value = item.value;
         elem.setAttribute("class", "subviewbutton");
-        addShortcut(item, aDocument, elem);
         containerElem.appendChild(elem);
       }
     },