Cleanup: Fix some unused-function warnings.

core/src/fpdfapi/fpdf_basic_module.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/fxcodec/fx_codec.h"
 #include "../../include/fpdfapi/fpdf_module.h"
 static CPDF_ModuleMgr*  g_FPDFAPI_pDefaultMgr = NULL;
 CPDF_ModuleMgr* CPDF_ModuleMgr::Get()
@@ skipping 43 matching lines @@
 {
     m_pDownloadCallback = callback;
 }
 FX_BOOL CPDF_ModuleMgr::DownloadModule(FX_LPCSTR module_name)
 {
     if (m_pDownloadCallback == NULL) {
         return FALSE;
     }
     return m_pDownloadCallback(module_name);
 }
-static CFX_ByteString _GetPath(const CFX_ByteString& folder, FX_LPCSTR name)
-{
-    FX_STRSIZE folder_len = folder.GetLength();
-#if _FX_OS_ == _FX_SYMBIAN_ || _FXM_PLATFORM_  == _FXM_PLATFORM_WINDOWS_
-    if (folder[folder_len - 1] == '\\') {
-        return folder + name;
-    } else {
-        return (folder + "\\") + name;
-    }
-#else
-    if (folder[folder_len - 1] == '/') {
-        return folder + name;
-    } else {
-        return (folder + "/") + name;
-    }
-#endif
-}
 void CPDF_ModuleMgr::NotifyModuleAvailable(FX_LPCSTR module_name)
 {
     if (FXSYS_strcmp(module_name, ADDIN_NAME_CJK) == 0) {
         m_pPageModule->NotifyCJKAvailable();
     } else if (FXSYS_strcmp(module_name, ADDIN_NAME_DECODER) == 0) {
         m_pRenderModule->NotifyDecoderAvailable();
     }
 }
 void CPDF_ModuleMgr::RegisterSecurityHandler(FX_LPCSTR filter, CPDF_SecurityHandler * (*CreateHandler)(void* param), void* param)
 {
@@ skipping 44 matching lines @@
     return m_pCodecModule ? m_pCodecModule->GetJbig2Module() : NULL;
 }
 ICodec_IccModule* CPDF_ModuleMgr::GetIccModule()
 {
     return m_pCodecModule ? m_pCodecModule->GetIccModule() : NULL;
 }
 ICodec_FlateModule* CPDF_ModuleMgr::GetFlateModule()
 {
     return m_pCodecModule ? m_pCodecModule->GetFlateModule() : NULL;
 }