test: Remove old bash test runner

We put a timeline of 257 to remove the old bash test runner so since
we're about to release 257, let's remove the old bash test runner in
favor of the meson + mkosi test runner.

test/TEST-59-RELOADING-RESTART/Makefile

@@ -1 +0,0 @@
-../TEST-01-BASIC/Makefile

test/TEST-59-RELOADING-RESTART/test.sh

@@ -1,11 +0,0 @@
-#!/usr/bin/env bash
-# SPDX-License-Identifier: LGPL-2.1-or-later
-set -e
-
-TEST_DESCRIPTION="Test auto restart of exited services which are stuck in reloading state"
-TEST_NO_QEMU=1
-
-# shellcheck source=test/test-functions
-. "$TEST_BASE_DIR/test-functions"
-
-do_test "$@"