Issue #1234 - Remove old versions of ToWstring and ToCString

src/plugin/ATL_Deprecate.cpp

 /**
  * \file ATL_Deprecate.cpp Transient functions used during the ATL removal process.
  */
 
 #include "ATL_Deprecate.h"
 
 std::wstring ToWstring(const ATL::CString& s)
 {
-  std::wstring result(static_cast<const wchar_t *>(s));
+  std::wstring result(static_cast<const wchar_t*>(s));
   return result;
 }
 
-std::wstring to_wstring(const ATL::CString& s)
-{
-  return ToWstring(s);
-}
-
 ATL::CString ToCString(const std::wstring& s)
 {
   return ATL::CString(s.c_str());
 }
-
-ATL::CString to_CString(const std::wstring& s)
-{
-  return ToCString(s);
-}