chore: remove adm support and references #363

Job	Run time
Ansible Lint	40s
Molecule (default-set1)	5m 21s
Molecule (default-set2)	14m 20s
Molecule (plus-set1)	5m 27s
Molecule (plus-set2)	12m 4s
Molecule (upgrade-set1)	5m 37s
Molecule (upgrade-set2)	8m 41s
Molecule (all-nms-modules-set1)	4m 50s
Molecule (all-nms-modules-set2)	9m 41s
Molecule (ga-nms-modules-set1)	5m 43s
Molecule (ga-nms-modules-set2)	11m 38s
Molecule (plus-count-ubuntu)	10m 25s
Molecule (plus-count-rhel)	5m 57s
Molecule (plus-count-upgrade)	6m 13s
Molecule (service-stopped-set1)	5m 9s
Molecule (service-stopped-set2)	12m 34s
	2h 4m 20s

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