Revert "Add XRC handler file to MSVC 10 project."

This reverts r75789 which shouldn't have been applied to 3.0 branch as the
files added to the project don't exist in it.

Closes #15942.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75825 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775