enhance: improve federation chart

packages/backend/src/services/register-or-fetch-instance-doc.ts

@@ -1,6 +1,5 @@
 import { Instance } from '@/models/entities/instance';
 import { Instances } from '@/models/index';
-import { federationChart } from '@/services/chart/index';
 import { genId } from '@/misc/gen-id';
 import { toPuny } from '@/misc/convert-host';
 import { Cache } from '@/misc/cache';
@@ -23,8 +22,6 @@ export async function registerOrFetchInstanceDoc(host: string): Promise<Instance
 			lastCommunicatedAt: new Date(),
 		}).then(x => Instances.findOneOrFail(x.identifiers[0]));
 
-		federationChart.update(true);
-
 		cache.set(host, i);
 		return i;
 	} else {