list-objects: consolidate traverse_commit_list[_filtered]

Now that all consumers of traverse_commit_list_filtered() populate the
'filter' member of 'struct rev_info', we can drop that parameter from
the method prototype to simplify things. In addition, the only thing
different now between traverse_commit_list_filtered() and
traverse_commit_list() is the presence of the 'omitted' parameter, which
is only non-NULL for one caller. We can consolidate these two methods by
having one call the other and use the simpler form everywhere the
'omitted' parameter would be NULL.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 37fa490..97909d4 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -822,9 +822,9 @@ static struct bitmap *find_objects(struct bitmap_index *bitmap_git,
 		show_data.bitmap_git = bitmap_git;
 		show_data.base = base;
 
-		traverse_commit_list_filtered(&revs->filter, revs,
-					      show_commit, show_object,
-					      &show_data, NULL);
+		traverse_commit_list(revs,
+				     show_commit, show_object,
+				     &show_data);
 
 		revs->include_check = NULL;
 		revs->include_check_obj = NULL;