Remove unneeded version.h include from drivers/staging/wlan-ng/prism2sta.c

It was pointed out by 'make versioncheck' that include of
linux/version.h is not needed in drivers/staging/wlan-ng/prism2sta.c .
This patch removes it.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/wlan-ng/prism2sta.c

@@ -50,7 +50,6 @@
 * --------------------------------------------------------------------
 */
 
-#include <linux/version.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>