staging: ks7010: remove unused spin_lock

Driver SDIO private data structure description includes a spin_lock
that is never used. This data structure only contains a pointer to the
sdio_func and a pointer to the main device private data. A spin_lock
is not required here.

Remove unused spin_lock.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks7010_sdio.c

@@ -892,7 +892,6 @@ static int ks7010_sdio_probe(struct sdio_func *func,
 		return -ENOMEM;
 
 	card->func = func;
-	spin_lock_init(&card->lock);
 
 	/*** Initialize  SDIO ***/
 	sdio_claim_host(func);

drivers/staging/ks7010/ks7010_sdio.h

@@ -98,7 +98,6 @@ struct hw_info_t {
 struct ks_sdio_card {
 	struct sdio_func *func;
 	struct ks_wlan_private *priv;
-	spinlock_t lock;
 };
 
 /* Tx Device struct */