Revert "fix ubO pt.5"

This reverts commit ae54ac8e28.

browser/components/webextensions/schemas/context_menus.json

@@ -11,8 +11,7 @@
         "choices": [{
           "type": "string",
           "enum": [
-            "contextMenus",
-            "menus"
+            "contextMenus"
           ]
         }]
       }
@@ -21,7 +20,7 @@
   {
     "namespace": "contextMenus",
     "description": "Use the <code>browser.contextMenus</code> API to add items to the browser's context menu. You can choose what types of objects your context menu additions apply to, such as images, hyperlinks, and pages.",
-    "permissions": ["contextMenus", "menus"],
+    "permissions": ["contextMenus"],
     "properties": {
       "ACTION_MENU_TOP_LEVEL_LIMIT": {
         "value": 6,