fs/sysv: remove another useless write_super call

We do not need to call 'sysv_write_super()' from 'sysv_remount()',
because VFS has called 'sysv_sync_fs()' before calling '->remount()'.
So remove it. Remove also '(un)lock_super()' which obvioulsy is becoming
useless in this function.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/sysv/inode.c

@@ -68,12 +68,9 @@ static void sysv_write_super(struct super_block *sb)
 static int sysv_remount(struct super_block *sb, int *flags, char *data)
 {
 	struct sysv_sb_info *sbi = SYSV_SB(sb);
-	lock_super(sb);
+
 	if (sbi->s_forced_ro)
 		*flags |= MS_RDONLY;
-	if (*flags & MS_RDONLY)
-		sysv_write_super(sb);
-	unlock_super(sb);
 	return 0;
 }