Remove pip and rpm packaging support (#11760)

Those files haven't been touched in roughly 5 years, and pip install on
Kubespray errors out.
The 'Requires:' are outdated, which suggests that no one is using this.

contrib/packaging/rpm/kubespray.spec

-%global srcname kubespray
-
-%{!?upstream_version: %global upstream_version %{version}%{?milestone}}
-
-Name:           kubespray
-Version:        master
-Release:        %(git describe | sed -r 's/v(\S+-?)-(\S+)-(\S+)/\1.dev\2+\3/')
-Summary:        Ansible modules for installing Kubernetes
-
-Group:          System Environment/Libraries
-License:        ASL 2.0
-Url:            https://github.com/kubernetes-sigs/kubespray
-Source0:        https://github.com/kubernetes-sigs/kubespray/archive/%{upstream_version}.tar.gz#/%{name}-%{release}.tar.gz
-
-BuildArch:      noarch
-BuildRequires:  git
-BuildRequires:  python2
-BuildRequires:  python2-devel
-BuildRequires:  python2-setuptools
-BuildRequires:  python-d2to1
-BuildRequires:  python2-pbr
-
-Requires: ansible >= 2.5.0
-Requires: python-jinja2 >= 2.10
-Requires: python-netaddr
-Requires: python-pbr
-
-%description
-
-Ansible-kubespray is a set of Ansible modules and playbooks for
-installing a Kubernetes cluster. If you have questions, join us
-on the https://slack.k8s.io, channel '#kubespray'.
-
-%prep
-%autosetup -n %{name}-%{upstream_version} -S git
-
-
-%build
-export PBR_VERSION=%{release}
-%{__python2} setup.py build bdist_rpm
-
-
-%install
-export PBR_VERSION=%{release}
-export SKIP_PIP_INSTALL=1
-%{__python2} setup.py install --skip-build --root %{buildroot} bdist_rpm
-
-
-%files
-%doc %{_docdir}/%{name}/README.md
-%doc %{_docdir}/%{name}/inventory/sample/hosts.ini
-%config %{_sysconfdir}/%{name}/ansible.cfg
-%config %{_sysconfdir}/%{name}/inventory/sample/group_vars/all.yml
-%config %{_sysconfdir}/%{name}/inventory/sample/group_vars/k8s_cluster.yml
-%license %{_docdir}/%{name}/LICENSE
-%{python2_sitelib}/%{srcname}-%{release}-py%{python2_version}.egg-info
-%{_datarootdir}/%{name}/roles/
-%{_datarootdir}/%{name}/playbooks/
-%defattr(-,root,root)
-
-
-%changelog

setup.cfg

-[metadata]
-name = kubespray
-summary = Ansible modules for installing Kubernetes
-description-file =
-    README.md
-author = Kubespray
-author-email = smainklh@gmail.com
-license = Apache License (2.0)
-home-page = https://github.com/kubernetes-sigs/kubespray
-classifier =
-  License :: OSI Approved :: Apache Software License
-  Development Status :: 4 - Beta
-  Intended Audience :: Developers
-  Intended Audience :: System Administrators
-  Intended Audience :: Information Technology
-  Topic :: Utilities
-
-[global]
-setup-hooks =
-    pbr.hooks.setup_hook
-
-[files]
-data_files =
-    usr/share/kubespray/playbooks/ =
-        cluster.yml
-        upgrade-cluster.yml
-        scale.yml
-        reset.yml
-        remove-node.yml
-        extra_playbooks/upgrade-only-k8s.yml
-    usr/share/kubespray/roles = roles/*
-    usr/share/kubespray/library = library/*
-    usr/share/doc/kubespray/ =
-        LICENSE
-        README.md
-    usr/share/doc/kubespray/inventory/ =
-        inventory/sample/inventory.ini
-    etc/kubespray/ =
-        ansible.cfg
-    etc/kubespray/inventory/sample/group_vars/ =
-        inventory/sample/group_vars/etcd.yml
-    etc/kubespray/inventory/sample/group_vars/all/ =
-        inventory/sample/group_vars/all/all.yml
-        inventory/sample/group_vars/all/azure.yml
-        inventory/sample/group_vars/all/coreos.yml
-        inventory/sample/group_vars/all/docker.yml
-        inventory/sample/group_vars/all/oci.yml
-        inventory/sample/group_vars/all/openstack.yml
-
-[wheel]
-universal = 1
-
-[pbr]
-skip_authors = True
-skip_changelog = True
-
-[bdist_rpm]
-group = "System Environment/Libraries"
-requires =
-    ansible
-    python-jinja2
-    python-netaddr

setup.py

-#   Copyright Red Hat, Inc. All Rights Reserved.
-#
-#   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.
-
-import setuptools
-
-setuptools.setup(
-    setup_requires=['pbr'],
-    pbr=True)