rm unusued typedef (#901)
rm unusued typedef (#901)


jbeder/yaml-cpp,jbeder/yaml-cpp,WrinklyNinja/yaml-cpp,graehl/yaml-cpp,loot/yaml-cpp,WrinklyNinja/yaml-cpp,loot/yaml-cpp,WrinklyNinja/yaml-cpp,graehl/yaml-cpp,WrinklyNinja/yaml-cpp,jbeder/yaml-cpp,graehl/yaml-cpp,graehl/yaml-cpp,loot/yaml-cpp,dand-oss/yaml-cpp,loot/yaml-cpp,jbeder/yaml-cpp,jbeder/yaml-cpp,graehl/yaml-cpp,dand-oss/yaml-cpp,dand-oss/yaml-cpp,dand-oss/yaml-cpp,dand-oss/yaml-cpp