Remove references to 'fileoverviewTags' which has been a noop since May 2012
Tested:
TAP --sample ran all affected tests and none failed
[]
@@ -372,7 +372,6 @@ names are valid warning class names:
* ``duplicateMessage``
* ``es5Strict``
* ``externsValidation``
-* ``fileoverviewTags``
* ``globalThis``
* ``internetExplorerChecks``
* ``invalidCasts``
