Delete setup.py to avoid validate_build_sdist

To create git tags we have to submit PRs to
the openstack/releases which checks if a project
contains setup.py file. If it does then the validation
test tries to build sdist package. For openstack-helm
this is not needed.

Change-Id: I3030dcf21d58d54d37b03e2db20004d086dbfaa9

setup.cfg

@@ -1,12 +0,0 @@
-[metadata]
-name = openstack-helm-infra
-summary = Helm charts for OpenStack-Helm infrastructure services
-description_file =
-    README.rst
-author = OpenStack
-author_email = openstack-discuss@lists.openstack.org
-home_page = https://docs.openstack.org/openstack-helm-infra/latest/
-classifier =
-    Intended Audience :: Developers
-    License :: OSI Approved :: Apache Software License
-    Operating System :: POSIX :: Linux

setup.py

@@ -1,20 +0,0 @@
-#!/usr/bin/env python
-# 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.
-
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
-import setuptools
-
-setuptools.setup(
-    setup_requires=['pbr'],
-    pbr=True)