Merge pull request #1116 from wallrj-cyberark/remove-cert-manager-release-1.17

Remove cert-manager release-1.17 jobs and refs

Author: cert-manager-prow[bot]

config/config.yaml

@@ -80,13 +80,6 @@ branch-protection:
             # branch basis, since context names differ. Post release, the
             # release branches can be updated to allow for cherry picks to the
             # latest release.
-            release-1.17:
-              required_status_checks:
-                contexts:
-                - pull-cert-manager-release-1.17-make-verify
-                - pull-cert-manager-release-1.17-make-test
-                - pull-cert-manager-release-1.17-e2e-v1-32
-                - pull-cert-manager-release-1.17-e2e-v1-32-upgrade
             release-1.18:
               required_status_checks:
                 contexts: