remove incorrect comment in do_emergency_remount

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/super.c b/fs/super.c
index 1527e6a..156eae5 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -631,8 +631,6 @@
 		down_write(&sb->s_umount);
 		if (sb->s_root && sb->s_bdev && !(sb->s_flags & MS_RDONLY)) {
 			/*
-			 * ->remount_fs needs lock_kernel().
-			 *
 			 * What lock protects sb->s_flags??
 			 */
 			do_remount_sb(sb, MS_RDONLY, NULL, 1);