media: cx25821: remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Zhiqi Song <songzhiqi1@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/pci/cx25821/cx25821.h

@@ -28,7 +28,6 @@
 #include "cx25821-sram.h"
 #include "cx25821-audio.h"
 
-#include <linux/version.h>
 #include <linux/mutex.h>
 
 #define UNSET (-1U)