Remove legacy jobs in neutron-vpnaas
Remove legacy jobs in neutron-vpnaas

[1] has been merged. It is safe to remove here.

[1] If66846aa7bfc2afd42b9ffd077cdb179563f5995

Co-Authored-By: Cao Xuan Hoang <ff2052e2b68b6e1a8b769cfddb4e24a60a87e163@vn.fujitsu.com>
Change-Id: I6feeb874eedbb7e7278923c4f6f4e526f1def24c
Needed-By: I9ee5756c15ab6c8a393dd77680d6277fb35a7ee2

openstack-infra/project-config,openstack-infra/project-config