BUG: remove 64 bit warnings

Source/cmLocalVisualStudio7Generator.cxx

@@ -345,8 +345,7 @@ void cmLocalVisualStudio7Generator::WriteConfiguration(std::ostream& fout,
     {
     fout << "\t\t\t\tWarningLevel=\"" << m_Makefile->GetDefinition("CMAKE_CXX_WARNING_LEVEL") << "\"\n";
     }
-  fout << "\t\t\t\tDetect64BitPortabilityProblems=\"TRUE\"\n"
-       << "\t\t\t\tDebugInformationFormat=\"3\"";
+  fout << "\t\t\t\tDebugInformationFormat=\"3\"";
   fout << "/>\n";  // end of <Tool Name=VCCLCompilerTool
 
   fout << "\t\t\t<Tool\n\t\t\t\tName=\"VCCustomBuildTool\"/>\n";