Remove remaining references to OverflowWarning.
diff --git a/Misc/Vim/python.vim b/Misc/Vim/python.vim
index 1b81c62..61d75e2 100644
--- a/Misc/Vim/python.vim
+++ b/Misc/Vim/python.vim
@@ -85,7 +85,7 @@
   syn keyword pythonException    LookupError OSError DeprecationWarning
   syn keyword pythonException    UnicodeError UnicodeEncodeError
   syn keyword pythonException    FloatingPointError ReferenceError NameError
-  syn keyword pythonException    OverflowWarning IOError SyntaxError
+  syn keyword pythonException    IOError SyntaxError
   syn keyword pythonException    FutureWarning ImportWarning SystemExit
   syn keyword pythonException    Exception EOFError StandardError ValueError
   syn keyword pythonException    TabError KeyError ZeroDivisionError SystemError