Do not create $GIT_DIR/remotes/ directory anymore.

Because we do not use --no-separate-remote anymore, there is no
reason to create that directory from the template.

t5510 test is updated to test both $GIT_DIR/remotes/ based
configuration and $GIT_DIR/config variable (credits to
Johannes).

Signed-off-by: Junio C Hamano <junkio@cox.net>

t/t5510-fetch.sh

@@ -23,15 +23,14 @@ test_expect_success "clone and setup child repos" '
 	git clone . two &&
 	cd two &&
 	git repo-config branch.master.remote one &&
-	{
-		echo "URL: ../one/.git/"
-		echo "Pull: refs/heads/master:refs/heads/one"
-	} >.git/remotes/one
+	git repo-config remote.one.url ../one/.git/ &&
+	git repo-config remote.one.fetch refs/heads/master:refs/heads/one &&
 	cd .. &&
 	git clone . three &&
 	cd three &&
 	git repo-config branch.master.remote two &&
 	git repo-config branch.master.merge refs/heads/one &&
+	mkdir -p .git/remotes &&
 	{
 		echo "URL: ../two/.git/"
 		echo "Pull: refs/heads/master:refs/heads/two"