s390: remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/setup.c

@@ -49,7 +49,6 @@
 #include <linux/memory.h>
 #include <linux/compat.h>
 #include <linux/start_kernel.h>
-#include <linux/version.h>
 
 #include <asm/ipl.h>
 #include <asm/facility.h>