Remove unused CFFL_FormFiller::GetSystemHandler().

The CPWL_Wnd method of the same name is used, however.

Change-Id: Ib5af880db70ec3ba44dc0826e98c45934f41acf2
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/65154
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index 2ef28d6..a214920 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -533,10 +533,6 @@
 
 void CFFL_FormFiller::OnTimerFired() {}
 
-IPWL_SystemHandler* CFFL_FormFiller::GetSystemHandler() const {
-  return m_pFormFillEnv->GetSysHandler();
-}
-
 void CFFL_FormFiller::EscapeFiller(CPDFSDK_PageView* pPageView,
                                    bool bDestroyPWLWindow) {
   m_bValid = false;
diff --git a/fpdfsdk/formfiller/cffl_formfiller.h b/fpdfsdk/formfiller/cffl_formfiller.h
index 1a80637..05bacaf 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.h
+++ b/fpdfsdk/formfiller/cffl_formfiller.h
@@ -131,7 +131,6 @@
   bool IsValid() const;
   CFX_FloatRect GetPDFAnnotRect() const;
 
-  IPWL_SystemHandler* GetSystemHandler() const;
   CPDFSDK_PageView* GetCurPageView(bool renew);
   void SetChangeMark();