bcachefs: Inode delete doesn't need to flush key cache anymore

Inode create checks to make sure the slot doesn't exist in the btree key
cache.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/inode.c

@@ -576,16 +576,9 @@ int bch2_inode_rm(struct bch_fs *c, u64 inode_nr)
 
 	bi_generation = 0;
 
-	ret = bch2_btree_key_cache_flush(&trans, BTREE_ID_INODES, POS(0, inode_nr));
-	if (ret) {
-		if (ret != -EINTR)
-			bch_err(c, "error flushing btree key cache: %i", ret);
-		goto err;
-	}
-
 	iter = bch2_trans_get_iter(&trans, BTREE_ID_INODES, POS(0, inode_nr),
-				   BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
-	k = bch2_btree_iter_peek_slot(iter);
+				   BTREE_ITER_CACHED|BTREE_ITER_INTENT);
+	k = bch2_btree_iter_peek_cached(iter);
 
 	ret = bkey_err(k);
 	if (ret)