Merge pull request #2630 from yichengq/remove-coreos-pkg

pkg: remove unused pkg/coreos

pkg/coreos/coreos.go

@@ -1,27 +0,0 @@
-// Copyright 2015 CoreOS, Inc.
-//
-// 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 coreos
-
-import (
-	"io/ioutil"
-	"strings"
-)
-
-func IsCoreOS() bool {
-	b, err := ioutil.ReadFile("/usr/lib/os-release")
-	if err != nil {
-		return false
-	}
-	return strings.Contains(string(b), "ID=coreos")
-}