submodule: completely remove reload_all

The function was removed, but its declaration and changelog entry about
its removal were forgotten.

The comment in the test doesn't make any sense as the function doesn't
exist anymore, so get rid of it as well.

CHANGELOG.md

@@ -177,6 +177,9 @@ v0.22 + 1
 * `git_submodule_save()` has been removed. The submodules are no
   longer configured via the objects.
 
+* `git_submodule_reload_all()` has been removed as we no longer cache
+  submodules.
+
 ### Breaking API changes
 
 * `git_smart_subtransport_cb` now has a `param` parameter.

include/git2/submodule.h

@@ -584,17 +584,6 @@ GIT_EXTERN(int) git_submodule_open(
 GIT_EXTERN(int) git_submodule_reload(git_submodule *submodule, int force);
 
 /**
- * Reread all submodule info.
- *
- * Call this to reload all cached submodule information for the repo.
- *
- * @param repo The repository to reload submodule data for
- * @param force Force full reload even if the data doesn't seem out of date
- * @return 0 on success, <0 on error
- */
-GIT_EXTERN(int) git_submodule_reload_all(git_repository *repo, int force);
-
-/**
  * Get the status for a submodule.
  *
  * This looks at a submodule and tries to determine the status.  It

tests/submodule/nosubs.c

@@ -71,8 +71,6 @@ void test_submodule_nosubs__add_and_delete(void)
 	git_submodule *sm;
 	git_buf buf = GIT_BUF_INIT;
 
-	/* note lack of calls to git_submodule_reload_all - this *should* work */
-
 	cl_git_fail(git_submodule_lookup(NULL, repo, "libgit2"));
 	cl_git_fail(git_submodule_lookup(NULL, repo, "submodules/libgit2"));