Bug 1225396 part 4 - Remove @@iterator workaround in Codegen.py. r=bz

dom/bindings/Codegen.py

@@ -2269,22 +2269,6 @@ class MethodDefiner(PropertyDefiner):
                 "condition": MemberCondition()
             })
 
-        # Output an @@iterator for generated iterator interfaces.  This should
-        # not be necessary, but
-        # https://bugzilla.mozilla.org/show_bug.cgi?id=1091945 means that
-        # %IteratorPrototype%[@@iterator] is a broken puppy.
-        if (not static and
-            not unforgeable and
-            descriptor.interface.isIteratorInterface()):
-            self.regular.append({
-                "name": "@@iterator",
-                "methodInfo": False,
-                "selfHostedName": "IteratorIdentity",
-                "length": 0,
-                "flags": "0",
-                "condition": MemberCondition()
-            })
-
         # Generate the maplike/setlike iterator, if one wasn't already
         # generated by a method. If we already have an @@iterator symbol, fail.
         if descriptor.interface.maplikeOrSetlikeOrIterable: