submodule--helper: remove resolve-relative-url subcommand

The shell subcommand `resolve-relative-url` is no longer required, as
its last caller has been removed when it was converted to C.

Signed-off-by: Atharva Raykar <raykar.ath@gmail.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Shourya Shukla <periperidip@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/submodule--helper.c

@@ -223,25 +223,6 @@ static char *compute_submodule_clone_url(const char *rel_url, const char *up_pat
 	return resolved_url;
 }
 
-static int resolve_relative_url(int argc, const char **argv, const char *prefix)
-{
-	const char *up_path = NULL;
-	char *res;
-	const char *url;
-
-	if (argc != 2 && argc != 3)
-		die("resolve-relative-url only accepts one or two arguments");
-
-	url = argv[1];
-	if (argc == 3)
-		up_path = argv[2];
-
-	res = compute_submodule_clone_url(url, up_path, 1);
-	puts(res);
-	free(res);
-	return 0;
-}
-
 static int resolve_relative_url_test(int argc, const char **argv, const char *prefix)
 {
 	char *remoteurl, *res;
@@ -3119,7 +3100,6 @@ static struct cmd_struct commands[] = {
 	{"update-clone", update_clone, 0},
 	{"ensure-core-worktree", ensure_core_worktree, 0},
 	{"relative-path", resolve_relative_path, 0},
-	{"resolve-relative-url", resolve_relative_url, 0},
 	{"resolve-relative-url-test", resolve_relative_url_test, 0},
 	{"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
 	{"init", module_init, SUPPORT_SUPER_PREFIX},