Remove Disco and Eoan bits

Change-Id: I18603ecd1245e696360a8b420fcebae4a4303d7e

src/metadata.yaml

@@ -13,7 +13,6 @@ tags:
 series:
 - xenial
 - bionic
-- eoan
 - focal
 - groovy
 subordinate: true

src/tests/bundles/disco-stein.yaml

@@ -1,49 +0,0 @@
-series: disco
-comment:
-- 'machines section to decide order of deployment. database sooner = faster'
-machines:
-  '0':
-    constraints: mem=3072M
-  '1':
-  '2':
-  '3':
-relations:
-- - keystone:shared-db
-  - mysql:shared-db
-- - cinder:shared-db
-  - mysql:shared-db
-- - cinder:identity-service
-  - keystone:identity-service
-- - cinder:amqp
-  - rabbitmq-server:amqp
-- - cinder:storage-backend
-  - cinder-purestorage:storage-backend
-applications:
-  mysql:
-    charm: cs:~openstack-charmers-next/percona-cluster
-    num_units: 1
-    to:
-    - '0'
-  keystone:
-    charm: cs:~openstack-charmers-next/keystone
-    num_units: 1
-    to:
-    - '1'
-  cinder:
-    charm: cs:~openstack-charmers-next/cinder
-    num_units: 1
-    to:
-    - '2'
-  cinder-purestorage:
-    series: disco
-    charm: ../../../cinder-purestorage
-    options:
-# Add config options here
-      driver-source: ppa:openstack-charmers/purestorage-stable
-      protocol: iscsi
-      volume-backend-name: cinder-pure
-  rabbitmq-server:
-    charm: cs:~openstack-charmers-next/rabbitmq-server
-    num_units: 1
-    to:
-    - '3'