test/fixedbug: drop obsolete bug125, bug166

R=gri
CC=golang-dev
https://golang.org/cl/173044

test/fixedbugs/bug125.go

-// errchk $G $D/$F.go
-
-// 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.
-
-package main
-
-import (
-	OS "os"  // should require semicolon here; this is no different from other decls
-	IO "io"  // ERROR "missing|syntax"
-)
-
-func main() {
-}

test/fixedbugs/bug166.go

-// errchk $G $D/$F.go
-
-// 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.
-
-package main
-import "os"
-func fn() {
-	var e os.Error
-	if e == nil {		// ERROR "syntax error|expected ';'"
-	}
-}