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';

src/remote/activitypub/request.ts

@@ -1,6 +1,5 @@
 import { request } from 'https';
 import { sign } from 'http-signature';
-import { URL } from 'url';
 import * as crypto from 'crypto';
 import { lookup, IRunOptions } from 'lookup-dns-cache';
 import * as promiseAny from 'promise-any';