remove test for .well-known/ bypass (path no longer routed)

The .well-known/ path was removed from Tinfoil attestation routing
since Tinfoil doesn't use it. The test that asserted GET /.well-known/
bypasses model lookup is no longer valid.

tests/unit/test_proxy_tinfoil_attestation_routing.py

@@ -93,26 +93,3 @@ def test_attestation_upstream_selection_is_tinfoil_only() -> None:
         "tee/other", [non_tinfoil, tinfoil]
     ) == [non_tinfoil, tinfoil]
 
-
-@pytest.mark.asyncio
-async def test_well_known_get_bypasses_model_lookup(
-    monkeypatch: pytest.MonkeyPatch, proxy_app: FastAPI
-) -> None:
-    upstream = MagicMock()
-    upstream.provider_type = "openai"
-    upstream.prepare_headers = MagicMock(return_value={})
-    upstream.forward_get_request = AsyncMock(
-        return_value=Response(status_code=200, content=b"lnurl metadata")
-    )
-
-    monkeypatch.setattr(proxy_module, "_upstreams", [upstream])
-    monkeypatch.setattr(proxy_module, "get_model_instance", MagicMock(side_effect=AssertionError))
-
-    async with AsyncClient(
-        transport=ASGITransport(app=proxy_app), base_url="http://test"  # type: ignore[arg-type]
-    ) as client:
-        response = await client.get("/.well-known/lnurlp/alice")
-
-    assert response.status_code == 200
-    assert response.content == b"lnurl metadata"
-    upstream.forward_get_request.assert_awaited_once()