refactor: remove all unused imports (#9951)

Co-authored-by: tamaina <tamaina@hotmail.co.jp>

packages/backend/src/server/api/stream/channels/main.ts

@@ -1,5 +1,4 @@
-import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository } from '@/models/index.js';
+import { Injectable } from '@nestjs/common';
 import { isInstanceMuted, isUserFromMutedInstance } from '@/misc/is-instance-muted.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { bindThis } from '@/decorators.js';