diff --git a/eth/backend.go b/eth/backend.go
index e8555061da..f3e4842a77 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -4,7 +4,6 @@ import (
 	"crypto/ecdsa"
 	"fmt"
 	"strings"
-	"sync"
 
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/crypto"
@@ -92,9 +91,6 @@ type Ethereum struct {
 
 	logger ethlogger.LogSystem
 
-	synclock  sync.Mutex
-	syncGroup sync.WaitGroup
-
 	Mining bool
 }