BuildingSystem::findBuildingDef was a byte-equivalent re-implementation of
BuildingsConfig::findBuildingDef. Same cleanup as the GameWorldView copy;
this one sits in the sim layer, so it was missed by both earlier passes.
Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GH8ZMRY3vhxxXcaUxBqxkk