text: // Copyright 2014 The Go Authors.  All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // +build go1.4
  
  package unix
  
  import "syscall"
  
  func Unsetenv(key string) error {
  	// This was added in Go 1.4.
  	return syscall.Unsetenv(key)
  }
  