diff --git a/vendor/cmd/go/internal/modfetch/googlesource/fetch.go b/vendor/cmd/go/internal/modfetch/googlesource/fetch.go
deleted file mode 100644
index a22a7bd..0000000
--- a/vendor/cmd/go/internal/modfetch/googlesource/fetch.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2018 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 googlesource
-
-import (
-	"fmt"
-	"strings"
-
-	"cmd/go/internal/modfetch/codehost"
-	"cmd/go/internal/modfetch/gitrepo"
-)
-
-func Lookup(path string) (codehost.Repo, string, error) {
-	i := strings.Index(path, "/")
-	if i+1 == len(path) || !strings.HasSuffix(path[:i+1], ".googlesource.com/") {
-		return nil, "", fmt.Errorf("not *.googlesource.com/*")
-	}
-	j := strings.Index(path[i+1:], "/")
-	if j >= 0 {
-		path = path[:i+1+j]
-	}
-	repo, err := gitrepo.Repo("https://" + path)
-	return repo, path, err
-}