Remove references to deprecated APIs
Remove references to deprecated APIs

The config sample file still references deprecated APIs that never
merged upstream (TripleO API) and/or migrated to Mistral long ago
(validations). Let's remove them to reduce confusion.

Change-Id: Ia9182eda700311a848bab22bcf34fa49dc64c16a

knowncitizen/tripleo-ui,knowncitizen/tripleo-ui,knowncitizen/tripleo-ui,knowncitizen/tripleo-ui