Revert "Run with KVM if we can in tests"

The nested virt issues we saw on OVH should be resolved now.
More information here: I980cdbc67d6e7b3a8a2520b2279ff3a1cdf68c4b

This reverts commit 748e3d2292.

Change-Id: If2adfc006ee9efb3f80e23d34311673b7c74d274

common-tasks/test-set-nodepool-vars.yml

@@ -34,9 +34,6 @@
         echo "galera_percona_xtrabackup_repo_host=${NODEPOOL_PERCONA_PROXY}"
         echo "openstack_hosts_rdo_mirror_url=${NODEPOOL_RDO_PROXY}"
         echo "galera_repo_host=${NODEPOOL_MIRROR_HOST}:8080"
-        if [[ ${NODEPOOL_PYPI_MIRROR} == *.ovh.* ]]; then
-          echo "nova_virt_type=qemu"
-        fi
         echo "repo_build_pip_default_index=${NODEPOOL_PYPI_MIRROR}"
       args:
         executable: /bin/bash