remove network from sprocket

src/Sprocket.cpp

@@ -21,8 +21,6 @@ Sprocket* Sprocket::activate() {
 
 Sprocket* Sprocket::join(Network& net){
     Serial.println("join network");
-    hasNetwork = 1;
-    network = &net;
     net.init(&scheduler);
     net.onReceive(bind(&Sprocket::dispatch,this, _1, _2));
     net.connect();
@@ -37,5 +35,4 @@ Sprocket* Sprocket::addTask(Task& tsk){
 
 void Sprocket::loop(){
     scheduler.execute();
-    if(hasNetwork) network->update();
 }