submodule--helper: remove add-config subcommand

Also no longer needed is this subcommand, as all of its functionality is
being called by the newly-introduced `module_add()` directly within 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

@@ -2940,54 +2940,6 @@ static void configure_added_submodule(struct add_data *add_data)
 	}
 }
 
-static int add_config(int argc, const char **argv, const char *prefix)
-{
-	int force = 0;
-	struct add_data add_data = ADD_DATA_INIT;
-
-	struct option options[] = {
-		OPT_STRING('b', "branch", &add_data.branch,
-			   N_("branch"),
-			   N_("branch of repository to store in "
-			      "the submodule configuration")),
-		OPT_STRING(0, "url", &add_data.repo,
-			   N_("string"),
-			   N_("url to clone submodule from")),
-		OPT_STRING(0, "resolved-url", &add_data.realrepo,
-			   N_("string"),
-			   N_("url to clone the submodule from, after it has "
-			      "been dereferenced relative to parent's url, "
-			      "in the case where <url> is a relative url")),
-		OPT_STRING(0, "path", &add_data.sm_path,
-			   N_("path"),
-			   N_("where the new submodule will be cloned to")),
-		OPT_STRING(0, "name", &add_data.sm_name,
-			   N_("string"),
-			   N_("name of the new submodule")),
-		OPT__FORCE(&force, N_("allow adding an otherwise ignored submodule path"),
-			   PARSE_OPT_NOCOMPLETE),
-		OPT_END()
-	};
-
-	const char *const usage[] = {
-		N_("git submodule--helper add-config "
-		   "[--force|-f] [--branch|-b <branch>] "
-		   "--url <url> --resolved-url <resolved-url> "
-		   "--path <path> --name <name>"),
-		NULL
-	};
-
-	argc = parse_options(argc, argv, prefix, options, usage, 0);
-
-	if (argc)
-		usage_with_options(usage, options);
-
-	add_data.force = !!force;
-	configure_added_submodule(&add_data);
-
-	return 0;
-}
-
 static void die_on_index_match(const char *path, int force)
 {
 	struct pathspec ps;
@@ -3162,7 +3114,6 @@ static struct cmd_struct commands[] = {
 	{"list", module_list, 0},
 	{"name", module_name, 0},
 	{"clone", module_clone, 0},
-	{"add-config", add_config, 0},
 	{"add", module_add, SUPPORT_SUPER_PREFIX},
 	{"update-module-mode", module_update_module_mode, 0},
 	{"update-clone", update_clone, 0},