remove traces of pulp2

[ipanova]

[ipanova@puffy pulp-ci]$ git grep '2.2[1|2]'
ci/config/releases/supported-releases.json:    "2.21",
ci/jjb/jobs/projects.yaml:    - 2.21:
ci/jjb/jobs/projects.yaml:        pulp_version: '2.21'
ci/jjb/jobs/projects.yaml:        pulp_version: '2.22'
[ipanova@puffy pulp-ci]$ git grep 2-master
ci/ansible/roles/pulp-coverage/tasks/install.yaml:    version: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/config/releases/2-master.yaml:    git_branch: 2-master
ci/docs-builder.py:    # rsync the nightly "2-master" docs to an unversioned "nightly" dir for
ci/docs-builder.py:    if build_type == 'nightly' and opts.release == '2-master':
ci/jjb/jobs/projects.yaml:      - 2-master
ci/jjb/jobs/projects.yaml:    - 2-master:
ci/jjb/jobs/projects.yaml:        reverse_trigger: '2-master'
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/projects.yaml:            - 2-master
ci/jjb/jobs/pulp-packaging.yaml:            ssh [email protected] "rsync -avz --delete /mnt/koji/releases/split/yum/pulp-nightly/pulp/ [email protected]:/srv/repos/pulp/pulp/testing/automation/2-master/stage/"
ci/jjb/jobs/unittests.yaml:            - 2-master
ci/jjb/jobs/unittests.yaml:                REPO_URL="https://repos.fedorapeople.org/pulp/pulp/testing/automation/2-master/stage/\$releasever/\$basearch/"
ci/jjb/jobs/unittests.yaml:                REPO_URL="https://repos.fedorapeople.org/pulp/pulp/testing/automation/2-master/stage/fedora-\$releasever/\$basearch/"

[dralley]

We should probably just archive this whole repo?

The only things living here that are maybe relevant are the github-bz automation, which is going to be of limited value as BZs stop being filed in favor of Jira, and maybe https://github.com/pulp/pulp-ci/blob/master/ci/config/releases/supported-releases.json, which keeps getting updated but tbh it's not clear that we actually still need it for anything.