[ci_netconfig] Remove unused and outdated role

This role was part of the old effort to have a common strategy to deploy
VA/DTs and install_yamls deployments but the approach drastically
changed during its development and it has never been used nor updated to
use the networking mapper.

Author: pablintino

ci/config/molecule.yaml

@@ -39,9 +39,6 @@
 - job:
     name: cifmw-molecule-ci_multus
     parent: cifmw-molecule-base-crc
-- job:
-    name: cifmw-molecule-ci_netconfig
-    parent: cifmw-molecule-base-crc
 - job:
     name: cifmw-molecule-ci_nmstate
     parent: cifmw-molecule-base-crc