removed core_pkgs variable as no longer needed

group_vars/homeserver.yml

@@ -102,4 +102,3 @@ pkgs:
     core: []
     # <list[<dict>]> representing user-level or supplemental flatpaks
     userspace: []
-core_pkgs: [] # @TODO document this

group_vars/vps.yml

@@ -103,4 +103,3 @@ pkgs:
     core: []
     # <list[<dict>]> representing user-level or supplemental flatpaks
     userspace: []
-core_pkgs: [] # @TODO document this