staging: rtl8192u: ieee80211: Remove msleep_interruptible_rsl Macro

Remove driver specific macro msleep_interruptible_rsl as it has been
replaced by a direct call to msleep_interruptible in the single
instance referencing it.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Reviewed-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211.h

@@ -329,8 +329,6 @@ typedef struct ieee_param {
 
 
 // linux under 2.6.9 release may not support it, so modify it for common use
-#define msleep_interruptible_rsl  msleep_interruptible
-
 #define IEEE80211_DATA_LEN		2304
 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
    6.2.1.1.2.