With the archive tests on the shared fixture, no test releases a
reservation before a service binds its port. Remove the method so the
only way to start a service on a reserved address is to transfer the
bound listener, which keeps the address held for the child's lifetime.
Validation: `cargo check -p ngit-grasp --tests` finds no remaining
caller.
Assisted-by: Claude Fable 5.1
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>