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

Remove including <linux/version.h> that don't need it.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_xcopy.c

@@ -21,7 +21,6 @@
  *
  ******************************************************************************/
 
-#include <linux/version.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/list.h>