submodule-config: remove submodule_from_cache

This continues the story of bf12fcd (submodule-config: store
the_submodule_cache in the_repository, 2017-06-22).

The previous patch taught submodule_from_path to take a repository into
account, such that submodule_from_{path, cache} are the same now.
Remove submodule_from_cache, migrating all its callers to
submodule_from_path.

Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

repository.c

@@ -176,7 +176,7 @@ int repo_submodule_init(struct repository *submodule,
 	struct strbuf worktree = STRBUF_INIT;
 	int ret = 0;
 
-	sub = submodule_from_cache(superproject, &null_oid, path);
+	sub = submodule_from_path(superproject, &null_oid, path);
 	if (!sub) {
 		ret = -1;
 		goto out;

submodule-config.c

@@ -635,15 +635,6 @@ const struct submodule *submodule_from_path(struct repository *r,
 	return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 }
 
-const struct submodule *submodule_from_cache(struct repository *repo,
-					     const struct object_id *treeish_name,
-					     const char *key)
-{
-	gitmodules_read_check(repo);
-	return config_from(repo->submodule_cache, treeish_name,
-			   key, lookup_path);
-}
-
 void submodule_free(struct repository *r)
 {
 	if (r->submodule_cache)

submodule-config.h

@@ -45,9 +45,6 @@ const struct submodule *submodule_from_name(struct repository *r,
 const struct submodule *submodule_from_path(struct repository *r,
 					    const struct object_id *commit_or_tree,
 					    const char *path);
-extern const struct submodule *submodule_from_cache(struct repository *repo,
-						    const struct object_id *treeish_name,
-						    const char *key);
 void submodule_free(struct repository *r);
 
 #endif /* SUBMODULE_CONFIG_H */

submodule.c

@@ -231,7 +231,7 @@ int is_submodule_active(struct repository *repo, const char *path)
 	const struct string_list *sl;
 	const struct submodule *module;
 
-	module = submodule_from_cache(repo, &null_oid, path);
+	module = submodule_from_path(repo, &null_oid, path);
 
 	/* early return if there isn't a path->module mapping */
 	if (!module)
@@ -1236,7 +1236,7 @@ static int get_next_submodule(struct child_process *cp,
 		if (!S_ISGITLINK(ce->ce_mode))
 			continue;
 
-		submodule = submodule_from_cache(spf->r, &null_oid, ce->name);
+		submodule = submodule_from_path(spf->r, &null_oid, ce->name);
 		if (!submodule) {
 			const char *name = default_name_or_path(ce->name);
 			if (name) {