Revert "Prepare: run E2E smoketests with GitHub actions (#23301)" (#23553)

This reverts commit 68be3a6bcd.

e2e-tests/.ci/dashboard.stop.sh

@@ -1,6 +0,0 @@
-#!/bin/bash
-set -e -u -o pipefail
-cd $(dirname $0)
-. .e2erc
-
-${MME2E_DC_DASHBOARD} down