Remove meaningless log test (#5025)

Signed-off-by: sunby <bingyi.sun@zilliz.com>

internal/log/log_test.go

@@ -1,32 +0,0 @@
-// Copyright (C) 2019-2020 Zilliz. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
-// with the License. You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software distributed under the License
-// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
-// or implied. See the License for the specific language governing permissions and limitations under the License.
-package log
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	lumberjack "gopkg.in/natefinch/lumberjack.v2"
-)
-
-func TestLumberjack(t *testing.T) {
-	l := &lumberjack.Logger{
-		Filename:   "/var/log/milvus/xxoo",
-		MaxSize:    100,
-		MaxAge:     1,
-		MaxBackups: 2,
-		LocalTime:  true,
-	}
-	_, err := l.Write([]byte{1, 1})
-	assert.Nil(t, err)
-	err = l.Close()
-	assert.Nil(t, err)
-}