Cleanup test

pkg/repository/store/store_test.go

@@ -17,9 +17,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path"
 	"testing"
-	"time"
 
 	"github.com/pingcap/tiup/pkg/repository/v1manifest"
 	"github.com/stretchr/testify/assert"
@@ -91,8 +89,6 @@ func TestConflict(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, uint(9527), m.Signed.(*v1manifest.Timestamp).Meta["test"].Length)
 
-	time.Sleep(3 * time.Second)
-
 	err = txn2.WriteManifest("test.json", test)
 	assert.Nil(t, err)
 	m, err = txn2.ReadManifest("test.json", &v1manifest.Timestamp{})
@@ -102,15 +98,8 @@ func TestConflict(t *testing.T) {
 	err = txn1.Commit()
 	assert.Nil(t, err)
 
-	time.Sleep(3 * time.Second)
-	fi, err = os.Stat(path.Join(root, "test.json"))
-	assert.Nil(t, err)
-	fmt.Println("txn1 commit", fi.ModTime().UnixNano())
-
 	err = txn2.Commit()
 	assert.NotNil(t, err)
-
-	t.Fail()
 }
 
 func TestUpstream(t *testing.T) {