staging: r8188eu: Remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it

Acked-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210818095331.3422-1-caihuoqing@baidu.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>