char: ipmi: Remove obsolete cleanup for clientdata

A few new i2c-drivers came into the kernel which clear the clientdata-pointer
on exit or error. This is obsolete meanwhile, the core will do it.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_ssif.c

@@ -1097,8 +1097,6 @@ static int ssif_remove(struct i2c_client *client)
 	if (!ssif_info)
 		return 0;
 
-	i2c_set_clientdata(client, NULL);
-
 	/*
 	 * After this point, we won't deliver anything asychronously
 	 * to the message handler.  We can unregister ourself.