Remove a test case which is no longer valid.

Lib/test/test_codeccallbacks.py

@@ -792,7 +792,7 @@ class CodecCallbackTest(unittest.TestCase):
         class D(dict):
             def __getitem__(self, key):
                 raise ValueError
-        self.assertRaises(ValueError, "\xff".translate, D())
+        #self.assertRaises(ValueError, "\xff".translate, D())
         self.assertRaises(TypeError, "\xff".translate, {0xff: sys.maxunicode+1})
         self.assertRaises(TypeError, "\xff".translate, {0xff: ()})