*: remove useless gomod (#34107)

ref #31716

tests/globalkilltest/global_kill_test.go

@@ -49,7 +49,10 @@ var (
 
 	pdClientPath = flag.String("pd", "127.0.0.1:2379", "pd client path")
 
-	lostConnectionToPDTimeout       = flag.Int("conn_lost", 5, "lost connection to PD timeout, should be the same as TiDB ldflag <ldflagLostConnectionToPDTimeout>")
+	// nolint: unused, deadcode
+	lostConnectionToPDTimeout = flag.Int("conn_lost", 5, "lost connection to PD timeout, should be the same as TiDB ldflag <ldflagLostConnectionToPDTimeout>")
+
+	// nolint: unused, deadcode
 	timeToCheckPDConnectionRestored = flag.Int("conn_restored", 1, "time to check PD connection restored, should be the same as TiDB ldflag <ldflagServerIDTimeToCheckPDConnectionRestored>")
 )
 
@@ -64,7 +67,7 @@ type GlobalKillSuite struct {
 	pdCli *clientv3.Client
 	pdErr error
 
-	clusterId string
+	clusterID string
 	pdProc    *exec.Cmd
 	tikvProc  *exec.Cmd
 }
@@ -74,7 +77,7 @@ func createGloabalKillSuite(t *testing.T) (s *GlobalKillSuite, clean func()) {
 	err := logutil.InitLogger(&logutil.LogConfig{Config: log.Config{Level: *logLevel}})
 	require.NoError(t, err)
 
-	s.clusterId = time.Now().Format(time.RFC3339Nano)
+	s.clusterID = time.Now().Format(time.RFC3339Nano)
 	err = s.startCluster()
 	require.NoError(t, err)
 	s.pdCli, s.pdErr = s.connectPD()
@@ -157,12 +160,12 @@ func (s *GlobalKillSuite) startPD(dataDir string) (err error) {
 }
 
 func (s *GlobalKillSuite) startCluster() (err error) {
-	err = s.startPD(s.clusterId)
+	err = s.startPD(s.clusterID)
 	if err != nil {
 		return
 	}
 
-	err = s.startTiKV(s.clusterId)
+	err = s.startTiKV(s.clusterID)
 	if err != nil {
 		return
 	}