cmd, eth: drop the blockchain version from cli/eth configs

cmd/utils/flags.go

@@ -146,11 +146,6 @@ var (
 		Usage: "Megabytes of memory allocated to internal caching (min 16MB / database forced)",
 		Value: 128,
 	}
-	BlockchainVersionFlag = cli.IntFlag{
-		Name:  "blockchainversion",
-		Usage: "Blockchain version (integer)",
-		Value: core.BlockChainVersion,
-	}
 	FastSyncFlag = cli.BoolFlag{
 		Name:  "fast",
 		Usage: "Enable fast syncing through state downloads",
@@ -681,7 +676,6 @@ func RegisterEthService(ctx *cli.Context, stack *node.Node, extra []byte) {
 		Etherbase:               MakeEtherbase(stack.AccountManager(), ctx),
 		ChainConfig:             MustMakeChainConfig(ctx),
 		FastSync:                ctx.GlobalBool(FastSyncFlag.Name),
-		BlockChainVersion:       ctx.GlobalInt(BlockchainVersionFlag.Name),
 		DatabaseCache:           ctx.GlobalInt(CacheFlag.Name),
 		DatabaseHandles:         MakeDatabaseHandles(),
 		NetworkId:               ctx.GlobalInt(NetworkIdFlag.Name),