Remove promotion and sync of ruby-2

Author: kylos101

.github/promote-images.yml

@@ -20,7 +20,6 @@
     workspace-python-3.9: "20.*"
     workspace-python-3.10: "20.*"
     workspace-python-3.11: "20.*"
-    workspace-ruby-2: "20.*"
     workspace-ruby-3: "20.*"
     workspace-ruby-3.0: "20.*"
     workspace-ruby-3.1: "20.*"

.github/sync-containers.yml

@@ -17,7 +17,6 @@ sync:
     - python-3.9
     - python-3.10
     - python-3.11
-    - ruby-2
     - ruby-3
     - ruby-3.0
     - ruby-3.1