Observer: Use std:: instead of boost

source/RobotAPI/components/units/KinematicUnitObserver.cpp

@@ -297,7 +297,7 @@ namespace armarx
         if (aValueChanged || newChannel)
         {
 
-            boost::unordered_map< ::std::string, ::armarx::VariantBasePtr> map;
+            std::unordered_map< ::std::string, ::armarx::VariantBasePtr> map;
             if (timestamp < 0)
             {
                 for (const auto& it : nameValueMap)