Use WHATWG API

> New application code should use the WHATWG API.

src/remote/activitypub/models/person.ts

@@ -6,7 +6,6 @@ import { resolveImage } from './image';
 import { isCollectionOrOrderedCollection, isCollection, IPerson } from '../type';
 import { DriveFile } from '../../../models/entities/drive-file';
 import { fromHtml } from '../../../mfm/fromHtml';
-import { URL } from 'url';
 import { resolveNote, extractEmojis } from './note';
 import { registerOrFetchInstanceDoc } from '../../../services/register-or-fetch-instance-doc';
 import { ITag, extractHashtags } from './tag';