Revert "manifest/9.2: Ensure package come from RHEL by default"

We already have to use coreos-installer from the RHAOS repo and it's
likely that we will have to do it again in the future for 4.14.

Remove this to avoid having to make a PR for each package.

This reverts commit 49f9824.

manifest-rhel-9.2.yaml

@@ -147,15 +147,6 @@ repo-packages:
       - nss-altfiles
       # Use the new containers/toolbox
       - toolbox
-      # RHCOS packages that are now part of RHEL and that will have to be
-      # explicitely removed from this list if they have to come from the RHAOS
-      # repo again.
-      - afterburn
-      - console-login-helper-messages-issuegen console-login-helper-messages-profile
-      - coreos-installer coreos-installer-bootinfra
-      - ignition
-      - ostree
-      - rpm-ostree
   - repo: rhel-9.0-server-ose-4.13
     packages:
       - conmon-rs