Modify some code for merge

plugin/consensus/para/para.go

@@ -5,11 +5,9 @@
 package para
 
 import (
+	"encoding/hex"
 	"fmt"
 	"sync"
-	"time"
-
-	"encoding/hex"
 
 	log "github.com/33cn/chain33/common/log/log15"
 
@@ -212,7 +210,6 @@ func (client *client) CheckBlock(parent *types.Block, current *types.BlockDetail
 func (client *client) Close() {
 	client.BaseClient.Close()
 	close(client.commitMsgClient.quit)
-	close(client.blockSyncClient.quitChan)
 	close(client.quitCreate)
 	close(client.blockSyncClient.quitChan)
 	client.wg.Wait()