code review 2205042: fix various comments

src/pkg/os/file_windows.go

Index: src/pkg/os/file_windows.go
===================================================================
--- a/src/pkg/os/file_windows.go
+++ b/src/pkg/os/file_windows.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// The os package provides a platform-independent interface to operating
-// system functionality.  The design is Unix-like.
 package os
 
 import (