commit: move members graph_pos, generation to a slab

We remove members `graph_pos` and `generation` from the struct commit.
The default assignments in init_commit_node() are no longer valid,
which is fine as the slab helpers return appropriate default values and
the assignments are removed.

We will replace existing use of commit->generation and commit->graph_pos
by commit_graph_data_slab helpers using
`contrib/coccinelle/commit.cocci'.

Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/alloc.c b/alloc.c
index 99fa934..957a0af 100644
--- a/alloc.c
+++ b/alloc.c
@@ -114,8 +114,6 @@ void init_commit_node(struct commit *c)
 {
 	c->object.type = OBJ_COMMIT;
 	c->index = alloc_commit_index();
-	c->graph_pos = COMMIT_NOT_FROM_GRAPH;
-	c->generation = GENERATION_NUMBER_INFINITY;
 }
 
 void *alloc_commit_node(struct repository *r)