An ``++extends++`` or ``++implements++`` list entry is redundant if:

* It is ``++Object++`` - all classes extend ``++Object++`` implicitly.
* It is ``++int++`` for an ``++enum++``
* It is listed multiple times.
* It is a superclass of another listed extension.

Such redundant declarations should be removed because they needlessly clutter the code and can be confusing.
