Delete zuul.d directory

Import of repository into opendev is not possible with zuul.d directory [1]. This commit can be reverted
after repo being moved under opendev umbrella.

[1] https://docs.opendev.org/opendev/infra-manual/latest/creators.html#add-the-project-to-the-master-projects-list

zuul.d/project.yaml

@@ -1,23 +0,0 @@
----
-# Copyright 2022, BBC R&D
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-- project:
-    templates:
-      - check-requirements
-      - openstack-ansible-linters-jobs
-      - openstack-ansible-deploy-aio_metal-jobs
-      - openstack-ansible-deploy-aio_distro_metal-jobs
-      - publish-openstack-docs-pti
-      - build-release-notes-jobs-python3