Bug 1829302 - Don't need to include header or have forward declaration for types that is from parent dictionary; r=peterv

As we have already included the header where the parent dictionary is declared.

Differential Revision: https://phabricator.services.mozilla.com/D176124

dom/bindings/Configuration.py

@@ -1053,12 +1053,7 @@ def getTypesFromDictionary(dictionary):
     """
     Get all member types for this dictionary
     """
-    types = []
-    curDict = dictionary
-    while curDict:
-        types.extend([m.type for m in curDict.members])
-        curDict = curDict.parent
-    return types
+    return [m.type for m in dictionary.members]
 
 
 def getTypesFromCallback(callback):