Remove unused PS generation code.

core/fxcodec/codec/fx_codec.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 "core/fxcodec/include/fx_codec.h"
 
 #include <cmath>
 #include <memory>
@@ skipping 59 matching lines @@
       return TRUE;
     }
   }
   return FALSE;
 }
 
 uint8_t* CCodec_ScanlineDecoder::ReadNextLine() {
   return v_GetNextLine();
 }
 
-FX_BOOL CCodec_BasicModule::RunLengthEncode(const uint8_t* src_buf,
-                                            uint32_t src_size,
-                                            uint8_t*& dest_buf,
-                                            uint32_t& dest_size) {
-  return FALSE;
-}
-
-FX_BOOL CCodec_BasicModule::A85Encode(const uint8_t* src_buf,
-                                      uint32_t src_size,
-                                      uint8_t*& dest_buf,
-                                      uint32_t& dest_size) {
-  return FALSE;
-}
-
 #ifdef PDF_ENABLE_XFA
 CFX_DIBAttribute::CFX_DIBAttribute()
     : m_nXDPI(-1),
       m_nYDPI(-1),
       m_fAspectRatio(-1.0f),
       m_wDPIUnit(0),
       m_nGifLeft(0),
       m_nGifTop(0),
       m_pGifLocalPalette(nullptr),
       m_nGifLocalPalNum(0),
@@ skipping 202 matching lines @@
     int bpc) {
   std::unique_ptr<CCodec_RLScanlineDecoder> pRLScanlineDecoder(
       new CCodec_RLScanlineDecoder);
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
     return nullptr;
   }
 
   return pRLScanlineDecoder.release();
 }