Remove stackhpc/neutron source for 2024.1

Author: seunghun1ee

etc/kayobe/kolla.yml

@@ -139,10 +139,6 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/magnum.git
     reference: stackhpc/{{ openstack_release }}
-  neutron-base:
-    type: git
-    location: https://github.com/stackhpc/neutron.git
-    reference: stackhpc/{{ openstack_release }}
   neutron-base-plugin-networking-generic-switch:
     type: git
     location: https://github.com/stackhpc/networking-generic-switch.git