Rename main go file and remove unnecessary node/config.go

node/config.go

@@ -1,19 +0,0 @@
-package node
-
-type Config struct {
-	EthPrivateKey    string       `toml:"ethPrivateKey"`
-	ListenAddress    string       `toml:"listenAddress"`
-	ListenPort       string       `toml:"listenPort"`
-	BootstrapAddress string       `toml:"bootstrapAddress"`
-	RendezvousString string       `toml:"rendezvousString"`
-	PubSub           PubSubConfig `toml:"pubSub"`
-}
-
-type PubSubConfig struct {
-	ProtocolID string `toml:"protocolID"`
-}
-
-type EthereumConfig struct {
-	PrivateKey     string `toml:"privateKey"`
-	GatewayAddress string `toml:"gatewayAddress"`
-}