tier-1: drop subscription-manager

This is only useful for RHEL developers who want to build RHEL
containers in the Fedora host and requires a subscription. Keep it out
by default; one can always of course re-layer it in a derived build.

tier-1/rpm-packaging.yaml

@@ -2,15 +2,3 @@
 # `dnf update` *client side* doesn't do much helpful...
 packages:
   - dnf
-  # To ensure we can enable client certs to access RHEL content
-  - subscription-manager
-
-postprocess:
-  # These enable librhsm which enables host subscriptions to work in containers
-  # https://github.com/rpm-software-management/librhsm/blob/fcd972cbe7c8a3907ba9f091cd082b1090231492/rhsm/rhsm-context.c#L30
-  # https://github.com/openshift/os/pull/876/commits/dd35dd0e102aeed90df14f05c8ae9da4c8c5962a
-  - |
-    #!/usr/bin/bash
-    set -xeuo pipefail
-    ln -sr /run/secrets/etc-pki-entitlement /etc/pki/entitlement-host
-    ln -sr /run/secrets/rhsm /etc/rhsm-host