btrfs: no need to run delayed refs after commit_fs_roots during commit

The inode number cache has been removed in this dev cycle, there's one
more leftover. We don't need to run the delayed refs again after
commit_fs_roots as stated in the comment, because btrfs_save_ino_cache
is no more since 5297199a ("btrfs: remove inode number cache
feature").

Nothing else between commit_fs_roots and btrfs_qgroup_account_extents
could create new delayed refs so the qgroup consistency should be safe.
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/transaction.c

@@ -2264,14 +2264,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 	 */
 	btrfs_free_log_root_tree(trans, fs_info);
 
-	/*
-	 * commit_fs_roots() can call btrfs_save_ino_cache(), which generates
-	 * new delayed refs. Must handle them or qgroup can be wrong.
-	 */
-	ret = btrfs_run_delayed_refs(trans, (unsigned long)-1);
-	if (ret)
-		goto unlock_tree_log;
-
 	/*
 	 * Since fs roots are all committed, we can get a quite accurate
 	 * new_roots. So let's do quota accounting.