ctucx.git: stagit

do not simplify the history by first-parent

Reference:
https://libgit2.org/libgit2/#HEAD/group/revwalk/git_revwalk_simplify_first_parent

Noticed on merge commits on:
https://git.simple-cc.org/scc/

Reported by quinq, thanks!

diff --git a/stagit-index.c b/stagit-index.c
@@ -101,7 +101,6 @@ writelog(FILE *fp)
 
 	git_revwalk_new(&w, repo);
 	git_revwalk_push_head(w);
-	git_revwalk_simplify_first_parent(w);
 
 	if (git_revwalk_next(&id, w) ||
 	    git_commit_lookup(&commit, repo, &id)) {

diff --git a/stagit.c b/stagit.c
@@ -743,7 +743,6 @@ writelog(FILE *fp, const git_oid *oid)
 
 	git_revwalk_new(&w, repo);
 	git_revwalk_push(w, oid);
-	git_revwalk_simplify_first_parent(w);
 
 	while (!git_revwalk_next(&id, w)) {
 		relpath = "";

@@ -881,7 +880,6 @@ writeatom(FILE *fp, int all)
 	if (all) {
 		git_revwalk_new(&w, repo);
 		git_revwalk_push_head(w);
-		git_revwalk_simplify_first_parent(w);
 		for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 			if (!(ci = commitinfo_getbyoid(&id)))
 				break;