SF Bug #611225.

Bring idle.pyw into alignment with idle.py, eliminate calling deleted
module IdleConf.py

Lib/idlelib/idle.pyw

 #! /usr/bin/env python
 
-import os
-import sys
-import IdleConf
-
-idle_dir = os.path.split(sys.argv[0])[0]
-IdleConf.load(idle_dir)
-
-# defer importing Pyshell until IdleConf is loaded
 import PyShell
 PyShell.main()