refactor!: finish parser migration

Finally! :)

This removes all code related to the old parser.

#65

lib/parser/classes/PlaylistMetadata.js

@@ -0,0 +1,13 @@
+'use strict';
+
+class PlaylistMetadata {
+  type = 'PlaylistMetadata';
+
+  constructor(data) {
+    this.title = data.title;
+    this.description = data.description || null;
+    // XXX: Appindexing should be in microformat
+  }
+}
+
+module.exports = PlaylistMetadata;