Remove horizon stackhpc fork source

Author: seunghun1ee

etc/kayobe/kolla.yml

@@ -121,10 +121,6 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/cloudkitty.git
     reference: stackhpc/{{ openstack_release }}
-  horizon:
-    type: git
-    location: https://github.com/stackhpc/horizon.git
-    reference: stackhpc/{{ openstack_release }}
   horizon-plugin-cloudkitty-dashboard:
     type: git
     location: https://github.com/stackhpc/cloudkitty-dashboard.git