replay: stop using the_repository

In `create_commit()` we're using `the_repository` even though we already
have a repository passed to use as an argument. Fix this.

Note that we still cannot get rid of `USE_THE_REPOSITORY_VARIABLE`. This
is because we use `DEFAULT_ABBREV and `get_commit_output_encoding()`,
both of which are stored as global variables that can be modified via
the Git configuration.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: pks-t

replay.c

@@ -62,7 +62,7 @@ struct commit *replay_create_commit(struct repository *repo,
 	obj = parse_object(repo, &ret);
 
 out:
-	repo_unuse_commit_buffer(the_repository, based_on, message);
+	repo_unuse_commit_buffer(repo, based_on, message);
 	free_commit_extra_headers(extra);
 	free_commit_list(parents);
 	strbuf_release(&msg);