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>
diff --git a/drivers/staging/wlan-ng/prism2sta.c b/drivers/staging/wlan-ng/prism2sta.c
index 21f25a2..417aea5 100644
--- a/drivers/staging/wlan-ng/prism2sta.c
+++ b/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>