main.go: drop it, useless in master branch

Brought by the `dev` merge originally.

main.go

@@ -1,20 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	"github.com/CityOfZion/neo-go/pkg/server"
-	"github.com/CityOfZion/neo-go/pkg/wire/protocol"
-)
-
-func main() {
-	s, err := server.New(protocol.MainNet, 10332)
-	if err != nil {
-		fmt.Println(err)
-		return
-	}
-	err = s.Run()
-	if err != nil {
-		fmt.Println("Server has stopped from the following error: ", err.Error())
-	}
-}