CI: stop setting libvirt_host_require_vt in overrides

It is now set globally in kayobe-config-dev.

Depends-On: https://review.opendev.org/c/openstack/kayobe-config-dev/+/829225
Change-Id: Ib46834fd226c3f59146bbaada53c8d079481d315

playbooks/kayobe-infra-vm-base/overrides.yml.j2

@@ -14,10 +14,6 @@ kolla_ansible_source_version: "{{ zuul.projects['opendev.org/openstack/kolla-ans
 kolla_openstack_logging_debug: True
 pip_upper_constraints_file: "/tmp/upper-constraints.txt"
 
-# The hosts used by Zuul may or may not have Virtualization Technology (VT)
-# enabled. Don't fail if it's disabled.
-libvirt_host_require_vt: false
-
 # Nested virtualisation is not working well in CI currently. Force the use of
 # QEMU.
 libvirt_vm_engine: "qemu"

playbooks/kayobe-seed-vm-base/overrides.yml.j2

@@ -14,10 +14,6 @@ kolla_ansible_source_version: "{{ zuul.projects['opendev.org/openstack/kolla-ans
 kolla_openstack_logging_debug: True
 pip_upper_constraints_file: "/tmp/upper-constraints.txt"
 
-# The hosts used by Zuul may or may not have Virtualization Technology (VT)
-# enabled. Don't fail if it's disabled.
-libvirt_host_require_vt: false
-
 # Nested virtualisation is not working well in CI currently. Force the use of
 # QEMU.
 libvirt_vm_engine: "qemu"