Staging: cpc-usb: remove unused #include <linux/version.h>

Remove unused #include <linux/version.h>'s in
drivers/staging/cpc-usb/cpc-usb_drv.c.

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