Remove wxUniversal configuration from the MSVC 10 project files.

As these configurations are not present in the automatically generated files
any more, remove them from the manually created ones too.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74601 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775