Remove a few unused variables, functions, and tables.

core/src/fxge/dib/fx_dib_transform.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/fxge/fx_dib.h"
 #include "dib_int.h"
 int SDP_Table[513] = {
     256, 256, 256, 256, 256, 256, 256, 256, 256, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254,
@@ skipping 520 matching lines @@
                         *dest_scan = *src_pixel;
                     }
                     dest_scan ++;
                 }
             }
         }
     } else {
         int Bpp = m_Storer.GetBitmap()->GetBPP() / 8;
         int destBpp = pTransformed->GetBPP() / 8;
         if (Bpp == 1) {
-            FX_BOOL bHasAlpha = m_Storer.GetBitmap()->HasAlpha();
             FX_DWORD argb[256];
             FX_ARGB* pPal = m_Storer.GetBitmap()->GetPalette();
             if (pPal) {
                 for (int i = 0; i < 256; i ++) {
                     argb[i] = pPal[i];
                 }
             } else {
                 if (m_Storer.GetBitmap()->IsCmykImage())
                     for (int i = 0; i < 256; i ++) {
                         argb[i] = 255 - i;
@@ skipping 236 matching lines @@
                         }
                         dest_pos += destBpp;
                     }
                 }
             }
         }
     }
     m_Storer.Replace(pTransformed);
     return FALSE;
 }