chore: nuke the validation (#553)

Remove all validation related files, since they are no longer present
after moving out the validation code to its own repository:

    https://github.com/packit/validation

All image builds and changes should be done there.

Author: mfocko

.github/workflows/build-and-push-cronjob-image.yml

@@ -7,7 +7,6 @@ on:
       - main
     paths:
       - cron-jobs/import-images/**
-      - cron-jobs/packit-service-validation/**
 
 jobs:
   build-and-push:
@@ -20,7 +19,6 @@ jobs:
       matrix:
         include:
           - image: import-images
-          - image: packit-service-validation
 
     env:
       path: cron-jobs/${{ matrix.image }}/

.gitignore

@@ -15,6 +15,3 @@ secrets/fedora-source-git/stg/*
 
 # used in move_stable script
 move_stable_repositories
-
-# secrets for validation
-cron-jobs/packit-service-validation/secrets