test(contextual): remove floating-specific tests

Replaced by tests/test_contextual_*.py in M3.
No dedicated test_floating_*.py files existed; floating test
functions were embedded in test_deep_agent.py and test_ws_unified.py
and have been removed from those files.

tests/test_ws_unified.py

@@ -1,6 +1,6 @@
 """Integration tests for the unified WebSocket handler (Step 5).
 
-Tests the device WS endpoint with home_request and floating_request frames,
+Tests the device WS endpoint with home_request frames,
 verifying that the correct v3 frame sequence is returned.
 
 LLM calls are mocked to avoid network dependency.
@@ -34,7 +34,7 @@ def _override_db(db_session):
 
 
 def _recv_until_end(ws, max_frames: int = 20) -> list[dict]:
-    """Receive frames until stream_end (or stream_end inside floating flow), or max_frames."""
+    """Receive frames until stream_end or max_frames."""
     frames = []
     for _ in range(max_frames):
         raw = ws.receive_text()
@@ -49,11 +49,6 @@ async def _mock_home_stream(user_id, message, context):
     yield "token", "Hello"
 
 
-async def _mock_floating_stream(user_id, message, context):
-    yield "floating_domain", {"type": "task", "id": None, "section": None}
-    yield "token", "Here is a summary"
-
-
 # ── tests ─────────────────────────────────────────────────────────────────────
 
 def test_home_request_produces_stream_frames(client):
@@ -79,33 +74,6 @@ def test_home_request_produces_stream_frames(client):
     assert types.index(WsFrameType.stream_start) < types.index(WsFrameType.stream_end)
 
 
-def test_floating_request_produces_domain_frame(client):
-    """floating_request → floating_domain first, then stream_text*, stream_end."""
-    token = make_jwt("power", user_id=USER_ID)
-
-    with patch("app.api.routes.device_ws.run_floating_stream", side_effect=_mock_floating_stream):
-        with client.websocket_connect(f"/api/v1/ws/device?token={token}") as ws:
-            ws.send_text(json.dumps({
-                "type": "device_hello", "device_id": "dev-2", "agent_ids": []
-            }))
-            ws.send_text(json.dumps({
-                "type": "floating_request",
-                "request_id": "p1",
-                "message": "Summarize this task",
-                "scope": {"type": "task", "id": "task-123"},
-            }))
-            frames = _recv_until_end(ws)
-
-    types = [f["type"] for f in frames]
-    assert WsFrameType.floating_domain in types
-    assert WsFrameType.stream_end in types
-    assert types.index(WsFrameType.floating_domain) < types.index(WsFrameType.stream_end)
-
-    domain_frame = next(f for f in frames if f["type"] == WsFrameType.floating_domain)
-    assert domain_frame["domain"]["type"] == "task"
-    assert domain_frame["request_id"] == "p1"
-
-
 def test_home_request_request_id_propagated(client):
     """request_id in home_request is echoed in all response frames."""
     token = make_jwt("power", user_id=USER_ID)