init/do_mounts_md.c: remove duplicated #include

Removed duplicated #include <linux/delay.h> in init/do_mounts_md.c.

The same compile error ("error: implicit declaration of function
'msleep'") got fixed twice:

- f8b77d39397e1510b1a3bcfd385ebd1a45aae77f ("init/do_mounts_md.c:
msleep compile fix")

- 73b4a24f5ff09389ba6277c53a266b142f655ed2 ("init/do_mounts_md.c must
#include <linux/delay.h>")

by people adding the <linux/delay.h> include in two slightly different
places. Andrew's quilt scripts happily ignore the fuzz, and will
re-apply the patch even though they had conflicts.

Signed-off-by: Huang Weiyi <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

init/do_mounts_md.c

···
 #include <linux/delay.h>
 #include <linux/raid/md.h>
-#include <linux/delay.h>
 
 #include "do_mounts.h"