fetch: don't overlay config with submodule-config

Don't rely on overlaying the repository's config on top of the
submodule-config, instead query the repository's config directly for the
fetch_recurse field.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fetch.c

@@ -1362,7 +1362,6 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 
 	if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
 		gitmodules_config();
-		git_config(submodule_config, NULL);
 	}
 
 	if (all) {