unnecessary symmetric warnig

[GoogleCodeExporter]

Please describe the feature, problem, or bug:

Using the 'symmetric' documentclass option with the tufte book documentclass, 
the following warning is shown:

LaTeX Warning: Unused global option(s):[symmetric].

Nevertheless, the document layout reflect the usage of this option

What is the expected output? What do you see instead?

No warning should be issued.

What version of Tufte-LaTeX are you using?  With which TeX distribution?

tufte version 3.5.0, TeXlive 2009/Debian

Original issue reported on code.google.com by [email protected] on 8 Sep 2010 at 4:40