Remove enum XFA_DATETIMETYPE.

It is completely unused.

Change-Id: I76e74ba85540b339ce815878a9b9406c69a34b4b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/84450
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fxfa/cxfa_ffdatetimeedit.h b/xfa/fxfa/cxfa_ffdatetimeedit.h
index bad5424..6a4d416 100644
--- a/xfa/fxfa/cxfa_ffdatetimeedit.h
+++ b/xfa/fxfa/cxfa_ffdatetimeedit.h
@@ -10,12 +10,6 @@
 #include "core/fxcrt/fx_coordinates.h"
 #include "xfa/fxfa/cxfa_fftextedit.h"
 
-enum XFA_DATETIMETYPE {
-  XFA_DATETIMETYPE_Date = 0,
-  XFA_DATETIMETYPE_Time,
-  XFA_DATETIMETYPE_DateAndTime
-};
-
 class CFWL_DateTimePicker;
 class CFWL_Event;
 class CFWL_Widget;