refactor(signalr): remove SignalR server & msgpack_lazer_api

Maybe we can make `msgpack_lazer_api` independent?

app/database/room.py

@@ -1,5 +1,4 @@
 from datetime import datetime
-from typing import TYPE_CHECKING
 
 from app.database.item_attempts_count import PlaylistAggregateScore
 from app.database.room_participated_user import RoomParticipatedUser
@@ -32,9 +31,6 @@ from sqlmodel import (
 )
 from sqlmodel.ext.asyncio.session import AsyncSession
 
-if TYPE_CHECKING:
-    from app.models.multiplayer_hub import ServerMultiplayerRoom
-
 
 class RoomBase(SQLModel, UTCBaseModel):
     name: str = Field(index=True)
@@ -163,25 +159,6 @@ class RoomResp(RoomBase):
             resp.current_user_score = await PlaylistAggregateScore.from_db(room.id, user.id, session)
         return resp
 
-    @classmethod
-    async def from_hub(cls, server_room: "ServerMultiplayerRoom") -> "RoomResp":
-        room = server_room.room
-        resp = cls(
-            id=room.room_id,
-            name=room.settings.name,
-            type=room.settings.match_type,
-            queue_mode=room.settings.queue_mode,
-            auto_skip=room.settings.auto_skip,
-            auto_start_duration=int(room.settings.auto_start_duration.total_seconds()),
-            status=server_room.status,
-            category=server_room.category,
-            # duration = room.settings.duration,
-            starts_at=server_room.start_at,
-            participant_count=len(room.users),
-            channel_id=server_room.room.channel_id or 0,
-        )
-        return resp
-
 
 class APIUploadedRoom(RoomBase):
     def to_room(self) -> Room: