Remove warnings

Source/cmLocalVisualStudio6Generator.cxx

@@ -531,7 +531,6 @@ void cmLocalVisualStudio6Generator::SetBuildType(BuildType b,
   // reset m_Configurations
   m_Configurations.erase(m_Configurations.begin(), m_Configurations.end());
   // now add all the configurations possible
-  char buffer[2048];
   std::string line;
   while(cmSystemTools::GetLineFromStream(fin, line))
     {
@@ -841,7 +840,6 @@ void cmLocalVisualStudio6Generator::WriteDSPHeader(std::ostream& fout, const cha
     {
     cmSystemTools::Error("Error Reading ", m_DSPHeaderTemplate.c_str());
     }
-  char buffer[2048];
 
   std::string line;
   while(cmSystemTools::GetLineFromStream(fin, line))

Source/cmSystemTools.cxx

@@ -1291,8 +1291,6 @@ bool RunCommandViaSystem(const char* command,
 {  
   std::cout << "@@ " << command << std::endl;
 
-  const int BUFFER_SIZE = 4096;
-  char buffer[BUFFER_SIZE];
   std::string commandInDir;
   if(dir)
     {

Source/cmUseMangledMesaCommand.cxx

@@ -89,8 +89,6 @@ CopyAndFullPathMesaHeader(const char* source,
     }
   // now copy input to output and expand variables in the
   // input file at the same time
-  const int bufSize = 4096;
-  char buffer[bufSize];
   std::string inLine;  
   // regular expression for any #include line
   cmRegularExpression includeLine("^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]");