removed double flag. Closes #421

cmd/ethereum/flags.go

@@ -134,7 +134,6 @@ func Init() {
 
 	flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap")
 	flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers")
-	flag.IntVar(&MinerThreads, "minerthreads", runtime.NumCPU(), "number of miner threads")
 
 	flag.Parse()