don't need Pango workaround code with GTK+3

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75170 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/font.cpp

@@ -487,6 +487,7 @@ bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
     PangoAttrList* attrs = pango_attr_list_new();
     PangoAttribute* a;
 
+#ifndef __WXGTK3__
     if (wx_pango_version_check(1,16,0))
     {
         // a PangoLayout which has leading/trailing spaces with underlined font
@@ -525,6 +526,8 @@ bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
             pango_attr_list_insert(attrs, a);
         }
     }
+#endif // !__WXGTK3__
+
     if (GetUnderlined())
     {
         a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);