sh: mach-sh03: remove duplicate include

Remove duplicate header which is included twice.
Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Rich Felker <dalias@libc.org>

arch/sh/boards/mach-sh03/rtc.c

@@ -11,7 +11,6 @@
 #include <linux/sched.h>
 #include <linux/time.h>
 #include <linux/bcd.h>
-#include <linux/rtc.h>
 #include <linux/spinlock.h>
 #include <linux/io.h>
 #include <linux/rtc.h>