物理削除系の処理を削除

これらの処理はパフォーマンス的に現実的でないし、すべてのモデルの関係を把握している必要があり保守が困難
論理削除でなんとかする

src/models/note-watching.ts

@@ -1,6 +1,5 @@
 import * as mongo from 'mongodb';
 import db from '../db/mongodb';
-import isObjectId from '../misc/is-objectid';
 
 const NoteWatching = db.get<INoteWatching>('noteWatching');
 NoteWatching.createIndex(['userId', 'noteId'], { unique: true });
@@ -12,30 +11,3 @@ export interface INoteWatching {
 	userId: mongo.ObjectID;
 	noteId: mongo.ObjectID;
 }
-
-/**
- * NoteWatchingを物理削除します
- */
-export async function deleteNoteWatching(noteWatching: string | mongo.ObjectID | INoteWatching) {
-	let n: INoteWatching;
-
-	// Populate
-	if (isObjectId(noteWatching)) {
-		n = await NoteWatching.findOne({
-			_id: noteWatching
-		});
-	} else if (typeof noteWatching === 'string') {
-		n = await NoteWatching.findOne({
-			_id: new mongo.ObjectID(noteWatching)
-		});
-	} else {
-		n = noteWatching as INoteWatching;
-	}
-
-	if (n == null) return;
-
-	// このNoteWatchingを削除
-	await NoteWatching.remove({
-		_id: n._id
-	});
-}