Remove CPDFSDK_Widget::GetAlternateName()

It is uncalled (but there is a method of the same name in CPDF_FormField
that is called from JS callbacks).

Change-Id: I1abf3ed5cc5004bf2fde01d68c9d780e5e2805a6
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/65910
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

fpdfsdk/cpdfsdk_widget.cpp

diff --git a/fpdfsdk/cpdfsdk_widget.cpp b/fpdfsdk/cpdfsdk_widget.cpp
index 6d92b74..4ecc705 100644
--- a/fpdfsdk/cpdfsdk_widget.cpp
+++ b/fpdfsdk/cpdfsdk_widget.cpp
@@ -864,8 +864,3 @@
 
   return CPDF_Action(nullptr);
 }
-
-WideString CPDFSDK_Widget::GetAlternateName() const {
-  CPDF_FormField* pFormField = GetFormField();
-  return pFormField->GetAlternateName();
-}

fpdfsdk/cpdfsdk_widget.h

diff --git a/fpdfsdk/cpdfsdk_widget.h b/fpdfsdk/cpdfsdk_widget.h
index 3037a16..d328b67 100644
--- a/fpdfsdk/cpdfsdk_widget.h
+++ b/fpdfsdk/cpdfsdk_widget.h
@@ -85,7 +85,6 @@
   bool IsChecked() const;
   int GetAlignment() const;
   int GetMaxLen() const;
-  WideString GetAlternateName() const;
 
   void SetCheck(bool bChecked, NotificationOption notify);
   void SetValue(const WideString& sValue, NotificationOption notify);