fix TS errors: remove unused announcedBingo set, prefix unused playerId param

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/src/games/game-manager.ts

@@ -163,7 +163,6 @@ export class GameManager {
 		hasBingo: boolean
 	}>()
 	private bingoAnnouncements: { playerId: string; displayName: string }[] = []
-	private announcedBingo = new Set<string>()
 	private completedBingoCards: CompletedBingoCard[] = []
 
 	generateBingoCards(playerIds: string[]): void {
@@ -401,7 +400,7 @@ export class GameManager {
 	}
 
 	private buildQuizQuestionForPlayer(
-		playerId: string,
+		_playerId: string,
 		displayNames: Record<string, string>,
 	): QuizQuestion | null {
 		const round = this.currentQuizRound