packit: drop CentOS packaging

While releasing coreos-installer, we found that the current
CentOS packaging did not introduce enough benefit to outweigh
the process change required to keep other repos consistent.
We will revisit once additional support is added for running
builds/tests/ticketing.

Ref: packit/packit-service#2106

.packit.yaml

@@ -19,15 +19,6 @@ packages:
         - wget https://src.fedoraproject.org/rpms/rust-coreos-installer/raw/rawhide/f/rust-coreos-installer.spec
       changelog-entry:
         - bash -c 'echo "- New upstream release"'
-  coreos-installer-centos:
-    pkg_tool: centpkg
-    specfile_path: rust-coreos-installer.spec
-    downstream_package_name: rust-coreos-installer
-    actions:
-      post-upstream-clone:
-        - wget https://gitlab.com/redhat/centos-stream/rpms/rust-coreos-installer/-/raw/c9s/rust-coreos-installer.spec
-      changelog-entry:
-        - bash -c 'echo "- New upstream release"'
 
 jobs: 
 
@@ -48,10 +39,3 @@ jobs:
   packages: [coreos-installer-fedora]
   dist_git_branches:
     - fedora-all
-
-- job: propose_downstream
-  trigger: release
-  packages: [coreos-installer-centos]
-  dist_git_branches:
-    - c9s
-    - c10s

docs/release-notes.md

@@ -18,14 +18,15 @@ Internal changes:
 
 Packaging changes:
 
+- Drop Packit support for c9s packaging
+
 
 ## coreos-installer 0.22.1 (2024-07-24)
 
 Packaging changes:
 
 - add downstream_package_name for each package in packit.yaml
 
-
 ## coreos-installer 0.22.0 (2024-07-23)
 
 Internal changes: