Cleanup: Do not check pointers before deleting them.

fpdfsdk/src/formfiller/FFL_IFormFiller.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../include/formfiller/FFL_FormFiller.h"
 #include "../../include/formfiller/FFL_IFormFiller.h"
 #include "../../include/formfiller/FFL_CheckBox.h"
 #include "../../include/formfiller/FFL_ComboBox.h"
@@ skipping 686 matching lines @@
 void CFFL_IFormFiller::RemoveFormFiller(CPDFSDK_Annot* pAnnot)
 {
         if ( pAnnot != NULL )
         {
                 UnRegisterFormFiller( pAnnot );
         }
 }
 
 void CFFL_IFormFiller::UnRegisterFormFiller(CPDFSDK_Annot* pAnnot)
 {
-        CFFL_FormFiller * pFormFiller = NULL;
-
-        if (m_Maps.Lookup(pAnnot,pFormFiller))
-        {
-                if (pFormFiller)
-                        delete pFormFiller;
-                m_Maps.RemoveKey(pAnnot);
-        }
+    CFFL_FormFiller* pFormFiller = nullptr;
+    if (m_Maps.Lookup(pAnnot,pFormFiller)) {
+        delete pFormFiller;
+        m_Maps.RemoveKey(pAnnot);
+    }
 }
 
 void CFFL_IFormFiller::SetFocusAnnotTab(CPDFSDK_Annot* pWidget, FX_BOOL bSameField, FX_BOOL bNext)
 {
 
 }
 
 void CFFL_IFormFiller::QueryWherePopup(void* pPrivateData, FX_FLOAT fPopupMin,FX_FLOAT fPopupMax, int32_t & nRet, FX_FLOAT & fPopupRet)
 {
         ASSERT(pPrivateData != NULL);
@@ skipping 406 matching lines @@
         ASSERT(pPrivateData != NULL);
         CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;
         ASSERT(pData->pWidget != NULL);
 
         CFFL_FormFiller* pFormFiller = GetFormFiller(pData->pWidget, FALSE);
         ASSERT(pFormFiller != NULL);
 
         if (!bEditOrList)
                 pFormFiller->OnKeyStroke(bExit);
 }