fix circular reference between i.ts, instance.ts, and misskeyApi.ts

packages/frontend/src/i.ts

@@ -6,7 +6,6 @@
 import { computed, reactive } from 'vue';
 import * as Misskey from 'misskey-js';
 import { miLocalStorage } from '@/local-storage.js';
-import { fetchInstance } from '@/instance';
 
 // TODO: 他のタブと永続化されたstateを同期
 
@@ -30,10 +29,6 @@ export function incNotesCount() {
 	notesCount++;
 }
 
-// instance export can be empty sometimes, which causes problems.
-const instance = await fetchInstance();
-export const policies = computed<Misskey.entities.RolePolicies>(() => $i?.policies ?? instance.policies);
-
 if (_DEV_) {
 	(window as any).$i = $i;
 }