copr-builders: drop an old IBM Cloud hack

This is not needed now because we generate our own images (we don't rely
on the broken "VM snapshot" images).

roles/copr/backend/files/provision/provision_builder_tasks.yml

@@ -4,15 +4,6 @@
   when:
     - prepare_base_image is defined
 
-# TODO: Drop this entirely once we are on F35+
-- name: remove the hackish package breaking s390x subscriptions
-  shell:
-    cmd: rpm -evh `rpm -qa | grep katello-` ; subscription-manager clean
-  when:
-    - prepare_base_image is not defined
-    - "'s390x' in lookup('env', 'RESALLOC_NAME')"
-    - copr_builder_fedora_version == 34
-
 - name: drop extremely slow libvirt resolver
   lineinfile:
     dest: /etc/resolv.conf