docs(annotations): remove reference to Parent annotation

This annotation was removed in 6f4a39c

Author: petebacondarwin

modules/angular2/annotations.ts

@@ -5,8 +5,7 @@
  * Annotations provide the additional information that Angular requires in order to run your
  * application. This module
  * contains {@link Component}, {@link Directive}, and {@link View} annotations, as well as
- * {@link Parent} and {@link Ancestor} annotations that are
- * used by Angular to resolve dependencies.
+ * the {@link Ancestor} annotation that is used by Angular to resolve dependencies.
  *
  */