fixup??? path-walk API: avoid adding a root tree more than once

This is an incorrect left-over of a previous iteration.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

path-walk.c

@@ -344,11 +344,9 @@ static int setup_pending_objects(struct path_walk_info *info,
 		struct object *obj = pending->item;
 
 		/* Commits will be picked up by revision walk. */
-		if (obj->type == OBJ_COMMIT || obj->flags & SEEN)
+		if (obj->type == OBJ_COMMIT)
 			continue;
 
-		obj->flags |= SEEN;
-
 		/* Navigate annotated tag object chains. */
 		while (obj->type == OBJ_TAG) {
 			struct tag *tag = lookup_tag(info->revs->repo, &obj->oid);

t/t6601-path-walk.sh

@@ -397,26 +397,4 @@ test_expect_success 'trees are reported exactly once' '
 	test_line_count = 1 out-filtered
 '
 
-test_expect_success 'trees are reported exactly once' '
-	test_when_finished "rm -rf unique-trees" &&
-	test_create_repo unique-trees &&
-	(
-		cd unique-trees &&
-		mkdir initial &&
-		test_commit initial/file &&
-
-		git switch -c move-to-top &&
-		git mv initial/file.t ./ &&
-		test_tick &&
-		git commit -m moved &&
-
-		git update-ref refs/heads/other HEAD
-	) &&
-
-	test-tool -C unique-trees path-walk -- --all >out &&
-	tree=$(git -C unique-trees rev-parse HEAD:) &&
-	grep "$tree" out >out-filtered &&
-	test_line_count = 1 out-filtered
-'
-
 test_done