Changed to not change popup HTML file based on language

_locales/en/messages.json

@@ -105,8 +105,5 @@
   },
   "leftTimes": {
     "message": "You seem to have left some sponsor times unsubmitted. Go back to that page to submit them (they are not deleted)."
-  },
-  "Popup": {
-    "message": "popup_en.html"
   }
 }

manifest.json

@@ -44,7 +44,7 @@
   ],
   "browser_action": {
     "default_title": "__MSG_Name__",
-    "default_popup": "__MSG_Popup__"
+    "default_popup": "popup.html"
   }, 
   "background": {
     "scripts":[