remove baremetal agents
Created by: davejrt
We no longer use a baremetal queue for any of our agents after the introduction of stateless agents and the subsequent cutover of all e2e/qa tests.
Test Plan
N/A these agents are no longer deployed see https://github.com/sourcegraph/infrastructure/commit/bbf79b77c56808f3c8490f18c425e4a0b987cad2