staging: rtl8192u: Remove commented header.

This patch removes the commented header <linux/config.h>
as it is not used in modern linux systems.
Signed-off-by: Navya Sri Nizamkari <navyasri.tech@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c

@@ -9,7 +9,6 @@
  * more details.
  */
 
-//#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>