refactor : add concept module

src/lobby/lobby.module.ts

@@ -1,6 +1,5 @@
 import { Module, forwardRef } from '@nestjs/common';
 import { UsersModule } from 'src/users/users.module';
-import { WordModule } from 'src/word/words.module';
 import { LobbyController } from './lobby.controller';
 import { LobbyService } from './lobby.service';
 import { GamesModule } from 'src/games/games.module';