Remove IFX_Barcode.

xfa.gyp

 {
   "variables": {
     "pdf_enable_v8%": 1,
   },
   "target_defaults": {
     "defines": [
       "PDF_ENABLE_XFA",
     ],
     'msvs_disabled_warnings': [
       4005, 4018, 4146, 4333, 4345, 4267,
@@ skipping 157 matching lines @@
         "xfa/fwl/basewidget/ifwl_combobox.h",
         "xfa/fwl/basewidget/ifwl_datetimepicker.h",
         "xfa/fwl/basewidget/ifwl_edit.h",
         "xfa/fwl/basewidget/ifwl_listbox.h",
         "xfa/fwl/basewidget/ifwl_monthcalendar.h",
         "xfa/fwl/basewidget/ifwl_picturebox.h",
         "xfa/fwl/basewidget/ifwl_pushbutton.h",
         "xfa/fwl/basewidget/ifwl_scrollbar.h",
         "xfa/fwl/basewidget/ifwl_spinbutton.h",
         "xfa/fwl/basewidget/ifwl_tooltip.h",
-        "xfa/fwl/basewidget/ifx_barcode.h",
         "xfa/fwl/core/cfwl_event.h",
         "xfa/fwl/core/cfwl_note.h",
         "xfa/fwl/core/cfwl_message.h",
         "xfa/fwl/core/cfwl_themebackground.h",
         "xfa/fwl/core/cfwl_themepart.h",
         "xfa/fwl/core/cfwl_themetext.h",
         "xfa/fwl/core/cfwl_widgetimpproperties.h",
         "xfa/fwl/core/fwl_appimp.cpp",
         "xfa/fwl/core/fwl_appimp.h",
         "xfa/fwl/core/fwl_contentimp.cpp",
@@ skipping 597 matching lines @@
           "sources": [],
         }],
         ["OS == 'mac'", {
           "configurations": {},
           "sources": [],
         }],
       ]
     }
   ]
 }