Revert "fix: 添付ファイルのあるリクエストを受けたときの初動を改善 (#15896)" (#15927)

* Revert "fix: 添付ファイルのあるリクエストを受けたときの初動を改善 (#15896)"

This reverts commit 7e8cc4d7c0.

* fix CHANGELOG.md

packages/backend/src/server/ServerService.ts

@@ -73,7 +73,7 @@ export class ServerService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	public async launch() {
+	public async launch(): Promise<void> {
 		const fastify = Fastify({
 			trustProxy: true,
 			logger: false,
@@ -133,8 +133,8 @@ export class ServerService implements OnApplicationShutdown {
 				reply.header('content-type', 'text/plain; charset=utf-8');
 				reply.header('link', `<${encodeURI(location)}>; rel="canonical"`);
 				done(null, [
-					'Refusing to relay remote ActivityPub object lookup.',
-					'',
+					"Refusing to relay remote ActivityPub object lookup.",
+					"",
 					`Please remove 'application/activity+json' and 'application/ld+json' from the Accept header or fetch using the authoritative URL at ${location}.`,
 				].join('\n'));
 			});
@@ -301,7 +301,6 @@ export class ServerService implements OnApplicationShutdown {
 		}
 
 		await fastify.ready();
-		return fastify;
 	}
 
 	@bindThis