Remove empty and unnecessary wxFontDialogBase destructor.

This fixes build with wxUSE_FONTMAP==0 as this dtor was only defined inside
"#if wxUSE_FONTMAP" section. Instead of fixing this, just get rid of this dtor
entirely as it was unnecessary anyhow.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70953 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fontmap.cpp

@@ -518,10 +518,4 @@ bool wxFontMapper::IsEncodingAvailable(wxFontEncoding encoding,
     return wxTestFontEncoding(info);
 }
 
-#if wxUSE_FONTDLG
-wxFontDialogBase::~wxFontDialogBase()
-{
-}
-#endif
-
 #endif // wxUSE_FONTMAP