Clean-up .packit.yaml and sync with libxs

Removed additional_repos entries for copr_build jobs.

Author: Growl1234

.packit.yaml

@@ -23,20 +23,13 @@ jobs:
     trigger: release
     owner: growl
     project: release
-    additional_repos:
-      - copr://growl/release
   - <<: *copr_build
     trigger: commit
     branch: main
     project: devpkgs
-    additional_repos:
-      - copr://growl/devpkgs
-  - <<: *copr_build
+  - job: copr_build
     trigger: pull_request
     manual_trigger: true
-    project: devpkgs
-    additional_repos:
-      - copr://growl/devpkgs
     allowed_pr_authors:
       - hfp
       - Growl1234