Remove useless changes

Signed-off-by: Eduardo J. Ortega U <5791035+ejortegau@users.noreply.github.com>

Author: ejortegau

go/vt/vttablet/tabletserver/txthrottler/tx_throttler_test.go

@@ -22,11 +22,12 @@ package txthrottler
 //go:generate mockgen -destination mock_topology_watcher_test.go -package txthrottler vitess.io/vitess/go/vt/vttablet/tabletserver/txthrottler TopologyWatcherInterface
 
 import (
-	"github.com/golang/mock/gomock"
-	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
 
+	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/assert"
+
 	"vitess.io/vitess/go/vt/discovery"
 	"vitess.io/vitess/go/vt/throttler"
 	"vitess.io/vitess/go/vt/topo"