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no-useless-parameters
=====================
Reject common XPCOM methods called with useless optional parameters (eg.
``Services.io.newURI(url, null, null)``, or non-existent parameters (eg.
``Services.obs.removeObserver(name, observer, false)``).
This option can be autofixed (``--fix``).
Examples of incorrect code for this rule:
-----------------------------------------
.. code-block:: js
elt.addEventListener('click', handler, false);
Services.io.newURI('http://example.com', null, null);
Services.obs.notifyObservers(obj, 'topic', null);
Examples of correct code for this rule:
---------------------------------------
.. code-block:: js
elt.addEventListener('click', handler);
Services.io.newURI('http://example.com');
Services.obs.notifyObservers(obj, 'topic');