Revert ":robot: Update license headers / Format Go codes and YAML fil…

…es (#2221)"

This reverts commit 22fe741.

internal/observability/metrics/index/job/correction/correction.go

@@ -1,16 +1,3 @@
-// Copyright (C) 2019-2023 vdaas.org vald team <[email protected]>
-//
-// 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
-//
-//	https://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 correction
 
 import (