自分のノートにリアクションを押せるように (#6506)

* resolve #6468

* リモートから来たセルフリアクションの対応

src/remote/activitypub/kernel/like.ts

@@ -9,8 +9,6 @@ export default async (actor: IRemoteUser, activity: ILike) => {
 	const note = await fetchNote(targetUri);
 	if (!note) return `skip: target note not found ${targetUri}`;
 
-	if (actor.id === note.userId) return `skip: cannot react to my note`;
-
 	await extractEmojis(activity.tag || [], actor.host).catch(() => null);
 
 	await create(actor, note, activity._misskey_reaction || activity.content || activity.name);