Remove tests added in r64324, there is no need to have commented out code here and UTF-8 test was pretty strange as well (it's far from clear what should the result of converting "utf8Invalid" be). This also suppresses a warning that these changes introduced. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64387 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775