staging: rtl8192u: remove redundant assignment to pointer crypt

The pointer crypt is being set with a value that is never read,
the assignment is redundant and hence can be removed.

Thanks to Dan Carpenter for sanity checking that this was indeed
redundant.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20190822084609.8971-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c

@@ -743,7 +743,6 @@ static struct sk_buff *ieee80211_probe_resp(struct ieee80211_device *ieee, u8 *d
 	if (ieee->short_slot && (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_SLOT))
 		beacon_buf->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT);
 
-	crypt = ieee->crypt[ieee->tx_keyidx];
 	if (encrypt)
 		beacon_buf->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);