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>
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index ce78a70..d14a799 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -82,11 +82,8 @@
 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))