diff --git a/core/preimages.go b/core/preimages.go
index ac57290b42..aebdd9bc2a 100644
--- a/core/preimages.go
+++ b/core/preimages.go
@@ -7,8 +7,6 @@ import (
 	"os"
 	"strconv"
 
-	"github.com/ethereum/go-ethereum/crypto"
-
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/harmony-one/harmony/api/service/prometheus"
diff --git a/rpc/preimages.go b/rpc/preimages.go
index 71887030ac..2935f7e25d 100644
--- a/rpc/preimages.go
+++ b/rpc/preimages.go
@@ -2,7 +2,6 @@ package rpc
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/harmony-one/harmony/core"
 	"github.com/harmony-one/harmony/eth/rpc"
@@ -28,4 +27,3 @@ func (s *PreimagesService) Export(_ context.Context, path string) error {
 	// these are by default not blocking
 	return core.ExportPreimages(s.hmy.BlockChain, path)
 }
-