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The 'Requires:' are outdated, which suggests that no one is using this.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

@@ -1,62 +0,0 @@
-%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