Apparently we need this bogus "inline" for g++ < 3.4 but there is no reason to use it for the other compilers and this results in linking errors with e.g. MSVC, so remove it. Closes #13775. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70049 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775