refactor!: finish parser migration

Finally! :)

This removes all code related to the old parser.

#65

lib/parser/classes/comments/CommentSimplebox.js

@@ -0,0 +1,19 @@
+'use strict';
+
+const Parser = require('../..');
+const Thumbnail = require('../Thumbnail');
+const Text = require('../Text');
+
+class CommentSimplebox {
+  type = 'CommentSimplebox';
+
+  constructor(data) {
+    this.submit_button = Parser.parse(data.submitButton);
+    this.cancel_button = Parser.parse(data.cancelButton);
+    this.author_thumbnails = Thumbnail.fromResponse(data.authorThumbnail);
+    this.placeholder = new Text(data.placeholderText);
+    this.avatar_size = data.avatarSize;
+  }
+}
+
+module.exports = CommentSimplebox;