USB: remove unused #include <version.h>

The driver(s) below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
  drivers/usb/gadget/pxa27x_udc.c

This patch removes the said #include <version.h>.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/pxa27x_udc.c

@@ -22,7 +22,6 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
-#include <linux/version.h>
 #include <linux/errno.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>