Removing obsolete commented out code

Source commit: 6ffe69550e04eace00b6a30ac56095bfc7bee263

source/core/FileBuffer.cpp

@@ -64,8 +64,6 @@ DWORD __fastcall TFileBuffer::ReadStream(TStream * Stream, const DWORD Len, bool
   try
   {
     NeedSpace(Len);
-    // C++5
-    // FMemory->SetSize(FMemory->Position + Len);
     if (ForceLen)
     {
       Stream->ReadBuffer(GetPointer(), Len);