ALSA: keywest: Remove obsolete cleanup for clientdata

The i2c core will clear the clientdata pointer automatically.
We don't have to set the `data' field to NULL in remove() or
if probe() failed anymore.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/ppc/keywest.c

@@ -82,7 +82,6 @@ static int keywest_attach_adapter(struct i2c_adapter *adapter)
 
 static int keywest_remove(struct i2c_client *client)
 {
-	i2c_set_clientdata(client, NULL);
 	if (! keywest_ctx)
 		return 0;
 	if (client == keywest_ctx->client)