1.0.6dev: Remove duplicated logging when panel not found.
1.0.6dev: Remove duplicated logging when panel not found.

{{{
13:15:34 Trac[web_ui] WARNING: Unknown preference panel u'pygment'
13:15:34 Trac[main] WARNING: [127.0.0.1] HTTPNotFound: 404 Not Found (Unknown preference panel)
}}}


git-svn-id: 50cd48c816abc7a9f40e8e03a4277466cb30a3e4@13989 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac