staging: rtl8192u: remove redundant initialization of 'timeout'

Variable timeout is initialized however this value is never read and
it is reassigned a new value a little later, hence the initialization
is redundant and can be removed.

Cleans up clang warning:
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:1728:6: warning:
Value stored to 'timeout' during its initialization is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c

@@ -1725,7 +1725,7 @@ static void ieee80211_sta_ps_send_null_frame(struct ieee80211_device *ieee,
 static short ieee80211_sta_ps_sleep(struct ieee80211_device *ieee, u32 *time_h,
 				    u32 *time_l)
 {
-	int timeout = ieee->ps_timeout;
+	int timeout;
 	u8 dtim;
 	/*if(ieee->ps == IEEE80211_PS_DISABLED ||
 		ieee->iw_mode != IW_MODE_INFRA ||