vcl: tab cleanup of vcl/inc/impfont.hxx

Change-Id: I54f669cd4ba472744f013f157baa035519d052bf
vcl: remove FontRefCount typedef

There is honestly no real need for FontRefCount. I really cannot see
why this typedef was ever introduced into the codebase

Change-Id: Ifa24a95cf6c788b4b11a4425520a2f6bc0e61169