Treat debugger statements as lint errors

coffeelint.json

@@ -10,5 +10,8 @@
   },
   "no_interpolation_in_single_quotes": {
     "level": "error"
+  },
+  "no_debugger": {
+    "level": "error"
   }
 }

src/menu-manager.coffee

@@ -122,7 +122,6 @@ class MenuManager
 
   # find an existing menu item matching the given item
   findMatchingItem: (menu, {label, submenu}) ->
-    debugger unless menu?
     for item in menu
       if @normalizeLabel(item.label) is @normalizeLabel(label) and item.submenu? is submenu?
         return item