Staging: rtl8192u: remove unused #include <linux/version.h>

Remove unused #include <linux/version.h>('s) in
  drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c

@@ -30,7 +30,6 @@
 
 ******************************************************************************/
 #include <linux/wireless.h>
-#include <linux/version.h>
 #include <linux/kmod.h>
 #include <linux/slab.h>
 #include <linux/module.h>