go/build: delete Makefile

We can write syslist.go by hand.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5757057

src/pkg/go/build/Makefile

-# Copyright 2009 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.
-
-syslist.go: ../../../Make.inc Makefile
-	echo '// Generated automatically by make.' >$@
-	echo >>$@
-	echo 'package build' >>$@
-	echo >>$@
-	echo 'const goosList = "$(GOOS_LIST)"' >>$@
-	echo 'const goarchList = "$(GOARCH_LIST)"' >>$@

src/pkg/go/build/syslist.go

-// Generated automatically by make.
+// Copyright 2011 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.
 
 package build