drop latestRequestSentAt of instance

packages/backend/src/models/entities/Instance.ts

@@ -59,14 +59,6 @@ export class Instance {
 	})
 	public followersCount: number;
 
-	/**
-	 * 直近のリクエスト送信日時
-	 */
-	@Column('timestamp with time zone', {
-		nullable: true,
-	})
-	public latestRequestSentAt: Date | null;
-
 	/**
 	 * 直近のリクエスト送信時のHTTPステータスコード
 	 */

packages/backend/src/models/schema/federation-instance.ts

@@ -32,11 +32,6 @@ export const packedFederationInstanceSchema = {
 			type: 'number',
 			optional: false, nullable: false,
 		},
-		latestRequestSentAt: {
-			type: 'string',
-			optional: false, nullable: true,
-			format: 'date-time',
-		},
 		lastCommunicatedAt: {
 			type: 'string',
 			optional: false, nullable: false,