Remove provider_networks from neutron playbook
Remove provider_networks from neutron playbook

These tasks have been moved to os_neutron role with [1]

[1] https://opendev.org/openstack/openstack-ansible-os_neutron/commit/cdc9d88086426087cba34abe7cede2dded0263bf

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-os_neutron/+/817913
Change-Id: I0378d912895ff8710baca83f805f73e9972daba5

stackforge/os-ansible-deployment,stackforge/os-ansible-deployment,openstack/openstack-ansible,openstack/openstack-ansible