Remove unused code in CPDFXFA_Document

xfa/fxfa/app/xfa_ffsignature.cpp

Index: xfa/fxfa/app/xfa_ffsignature.cpp
diff --git a/xfa/fxfa/app/xfa_ffsignature.cpp b/xfa/fxfa/app/xfa_ffsignature.cpp
index 695969274cd9b7ce4e5f965f01b612ccac33b47c..3d92f286b996e7cf91a2053d1b3890e187b10e5f 100644
--- a/xfa/fxfa/app/xfa_ffsignature.cpp
+++ b/xfa/fxfa/app/xfa_ffsignature.cpp
@@ -34,11 +34,8 @@ void CXFA_FFSignature::RenderWidget(CFX_Graphics* pGS,
   DrawBorder(pGS, borderUI, m_rtUI, &mtRotate);
   RenderCaption(pGS, &mtRotate);
   DrawHighlight(pGS, &mtRotate, dwStatus, FALSE);
-  CFX_RectF rtWidget = m_rtUI;
-  IXFA_DocProvider* pDocProvider = m_pDataAcc->GetDoc()->GetDocProvider();
-  ASSERT(pDocProvider);
-  pDocProvider->RenderCustomWidget(this, pGS, &mtRotate, rtWidget);
 }
+
 FX_BOOL CXFA_FFSignature::OnMouseEnter() {
   return FALSE;
 }