These existed only to force the tokio thread pool to start before
reactor.run() under the old callWhenRunning-based startup. Now that the
pool starts lazily on first use, the constructions (and the
make_homeserver overrides that existed solely to host them) are dead
weight. The tearDown hooks that fire the reactor shutdown triggers stay:
they are still what stops the tokio pool for tests that exercise the
Rust /versions handler.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HyuiV3m44ZbK9o24EnMMES