staging: mt7621-mmc: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-mmc/dbg.c

@@ -36,7 +36,6 @@
  * Inc.
  */
 
-#include <linux/version.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/kthread.h>