eth: clean out light node notions from eth

eth/protocol.go

@@ -26,36 +26,18 @@ import (
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
-// Mode represents the mode of operation of the eth client.
-type Mode int
-
-const (
-	ArchiveMode Mode = iota // Maintain the entire blockchain history
-	FullMode                // Maintain only a recent view of the blockchain
-	LightMode               // Don't maintain any history, rather fetch on demand
-)
-
 // Constants to match up protocol versions and messages
 const (
 	eth61 = 61
 	eth62 = 62
 	eth63 = 63
-	eth64 = 64
 )
 
-// minimumProtocolVersion is the minimum version of the protocol eth must run to
-// support the desired mode of operation.
-var minimumProtocolVersion = map[Mode]uint{
-	ArchiveMode: eth61,
-	FullMode:    eth63,
-	LightMode:   eth64,
-}
-
 // Supported versions of the eth protocol (first is primary).
-var ProtocolVersions = []uint{eth64, eth63, eth62, eth61}
+var ProtocolVersions = []uint{eth63, eth62, eth61}
 
 // Number of implemented message corresponding to different protocol versions.
-var ProtocolLengths = []uint64{19, 17, 8, 9}
+var ProtocolLengths = []uint64{17, 8, 9}
 
 const (
 	NetworkId          = 1
@@ -90,11 +72,6 @@ const (
 	NodeDataMsg    = 0x0e
 	GetReceiptsMsg = 0x0f
 	ReceiptsMsg    = 0x10
-
-	// Protocol messages belonging to eth/64
-	GetAcctProofMsg     = 0x11
-	GetStorageDataProof = 0x12
-	Proof               = 0x13
 )
 
 type errCode int