Remove netfulfilledman.h duplicate (#2834)

Author: Bushstar

src/init.cpp

@@ -25,7 +25,6 @@
 #include "miner.h"
 #include "netbase.h"
 #include "net.h"
-#include "netfulfilledman.h"
 #include "net_processing.h"
 #include "policy/policy.h"
 #include "rpc/server.h"