quota: Remove quota_on_meta callback

There are no more users for quota_on_meta callback. Just remove it.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/quota/quota.c

@@ -82,11 +82,8 @@ unsigned int qtype_enforce_flag(int type)
 static int quota_quotaon(struct super_block *sb, int type, int cmd, qid_t id,
 		         struct path *path)
 {
-	if (!sb->s_qcop->quota_on && !sb->s_qcop->quota_on_meta &&
-	    !sb->s_qcop->quota_enable)
+	if (!sb->s_qcop->quota_on && !sb->s_qcop->quota_enable)
 		return -ENOSYS;
-	if (sb->s_qcop->quota_on_meta)
-		return sb->s_qcop->quota_on_meta(sb, type, id);
 	if (sb->s_qcop->quota_enable)
 		return sb->s_qcop->quota_enable(sb, qtype_enforce_flag(type));
 	if (IS_ERR(path))

include/linux/quota.h

@@ -369,7 +369,6 @@ struct qc_dqblk {
 /* Operations handling requests from userspace */
 struct quotactl_ops {
 	int (*quota_on)(struct super_block *, int, int, struct path *);
-	int (*quota_on_meta)(struct super_block *, int, int);
 	int (*quota_off)(struct super_block *, int);
 	int (*quota_enable)(struct super_block *, unsigned int);
 	int (*quota_disable)(struct super_block *, unsigned int);