Manually remove unused include in ResponderHelper.cpp

Removed unnecessary include for ResponderEndpointManager.

Author: peternewman

common/rdm/ResponderHelper.cpp

@@ -34,7 +34,6 @@
 #include "ola/network/MACAddress.h"
 #include "ola/network/NetworkUtils.h"
 #include "ola/rdm/RDMEnums.h"
-#include "ola/rdm/ResponderEndpointManager.h"
 #include "ola/rdm/ResponderHelper.h"
 #include "ola/rdm/ResponderSensor.h"
 #include "ola/strings/Utils.h"