COMP: fix warning

Source/cmGlobalUnixMakefileGenerator3.cxx

@@ -695,7 +695,6 @@ cmGlobalUnixMakefileGenerator3
   std::vector<std::string> depends;  
   std::vector<std::string> commands;
   std::string localName;
-  std::string makeTargetName;
 
   // write the directory level rules for this local gen
   //this->WriteDirectoryRules(ruleFileStream,lg);