Remove logic in fleetshard to support both Quarkus-based and non-Quarkus-based admin server versions.
Non-Quarkus-based admin server is decommissioned as of version 0.8.0
Merge request - Promote kas-fleetshard 0.21 to prod
Merge request - Updated US source to: 1746cd2 Remove handling for non-Quarkus admin server (#701)