Remove DataProvider from CFWL_WidgetProperties

xfa/fwl/core/cfwl_datetimepicker.h

Index: xfa/fwl/core/cfwl_datetimepicker.h
diff --git a/xfa/fwl/core/cfwl_datetimepicker.h b/xfa/fwl/core/cfwl_datetimepicker.h
index 67d0ff11634e32268b47932a07fe5ef7f07d1823..08e092e12a2c3cf1e781a0624b98c02d6dfcd3fa 100644
--- a/xfa/fwl/core/cfwl_datetimepicker.h
+++ b/xfa/fwl/core/cfwl_datetimepicker.h
@@ -10,8 +10,7 @@
 #include "xfa/fwl/core/cfwl_widget.h"
 #include "xfa/fwl/core/ifwl_datetimepicker.h"
 
-class CFWL_DateTimePicker : public CFWL_Widget,
-                            public IFWL_Widget::DataProvider {
+class CFWL_DateTimePicker : public CFWL_Widget {
  public:
   explicit CFWL_DateTimePicker(const CFWL_App* pApp);
   ~CFWL_DateTimePicker() override;