bcachefs: BTREE_ITER_FILTER_SNAPSHOTS is selected automatically

It doesn't have to be specified - this patch deletes the two instances
where it was.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/fs-io.c

@@ -1005,7 +1005,7 @@ static void bchfs_read(struct btree_trans *trans,
 
 	bch2_trans_iter_init(trans, &iter, BTREE_ID_extents,
 			     SPOS(inum.inum, rbio->bio.bi_iter.bi_sector, snapshot),
-			     BTREE_ITER_SLOTS|BTREE_ITER_FILTER_SNAPSHOTS);
+			     BTREE_ITER_SLOTS);
 	while (1) {
 		struct bkey_s_c k;
 		unsigned bytes, sectors, offset_into_extent;

fs/bcachefs/io.c

@@ -2326,7 +2326,7 @@ void __bch2_read(struct bch_fs *c, struct bch_read_bio *rbio,
 
 	bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
 			     SPOS(inum.inum, bvec_iter.bi_sector, snapshot),
-			     BTREE_ITER_SLOTS|BTREE_ITER_FILTER_SNAPSHOTS);
+			     BTREE_ITER_SLOTS);
 	while (1) {
 		unsigned bytes, sectors, offset_into_extent;
 		enum btree_id data_btree = BTREE_ID_extents;