Drop redundant note in globals-default.j2

Change-Id: I4d09018f4e921e90cbe7457c1f7fb025ef3acfa8

tests/templates/globals-default.j2

@@ -10,7 +10,6 @@ ansible_python_interpreter: /usr/bin/python3
 kolla_ansible_setup_any_errors_fatal: true
 
 kolla_base_distro: "{{ base_distro }}"
-# Zed dropped install_type so we have it only on upgrades
 network_interface: "{{ api_interface_name }}"
 network_address_family: "{{ address_family }}"
 kolla_container_engine: "{{ container_engine }}"