Some code simplification

django/utils/functional.py

@@ -258,17 +258,9 @@ class LazyObject(object):
     __dir__ = new_method_proxy(dir)
 
     # Dictionary methods support
-    @new_method_proxy
-    def __getitem__(self, key):
-        return self[key]
-
-    @new_method_proxy
-    def __setitem__(self, key, value):
-        self[key] = value
-
-    @new_method_proxy
-    def __delitem__(self, key):
-        del self[key]
+    __getitem__ = new_method_proxy(operator.getitem)
+    __setitem__ = new_method_proxy(operator.setitem)
+    __delitem__ = new_method_proxy(operator.delitem)
 
     __len__ = new_method_proxy(len)
     __contains__ = new_method_proxy(operator.contains)