Remove deprecation of sets.Set.update().

Lib/sets.py

@@ -504,10 +504,6 @@ def difference_update(self, other):
 
     def update(self, iterable):
         """Add all values from an iterable (such as a list or file)."""
-        import warnings
-        warnings.warn("The update() method deprecated; "
-                      "Use union_update() instead.",
-                      DeprecationWarning, 2)
         self._update(iterable)
 
     def clear(self):

Misc/NEWS

@@ -161,8 +161,7 @@ Library
 
 - sets.py now runs under Py2.2.  In addition, the argument restrictions
   for most set methods (but not the operators) have been relaxed to
-  allow any iterable.  Also the Set.update() has been deprecated because
-  it duplicates Set.union_update().
+  allow any iterable.
 
 - _strptime.py now has a behind-the-scenes caching mechanism for the most
   recent TimeRE instance used along with the last five unique directive