Remove dead code that was reactivated when fixing overrides.

fpdfsdk/src/formfiller/FFL_ComboBox.cpp

Index: fpdfsdk/src/formfiller/FFL_ComboBox.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
index 29352216ab3af87b296d3c9835d1c046a7ed0f32..3925e1434787f749ee9a317dcc9eae022732bfd7 100644
--- a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
+++ b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
@@ -256,24 +256,6 @@ CPWL_Wnd* CFFL_ComboBox::ResetPDFWindow(CPDFSDK_PageView* pPageView,
   return pRet;
 }
 
-void CFFL_ComboBox::OnKeyStroke(FX_BOOL bKeyDown, FX_UINT nFlag) {
-  ASSERT(m_pWidget != NULL);
-
-  int nFlags = m_pWidget->GetFieldFlags();
-
-  if (nFlags & FIELDFLAG_COMMITONSELCHANGE) {
-    if (m_bValid) {
-      CPDFSDK_PageView* pPageView = GetCurPageView();
-      ASSERT(pPageView != NULL);
-
-      if (CommitData(pPageView, nFlag)) {
-        DestroyPDFWindow(pPageView);
-        m_bValid = FALSE;
-      }
-    }
-  }
-}
-
 void CFFL_ComboBox::OnSetFocus(CPWL_Wnd* pWnd) {
   ASSERT(m_pApp != NULL);