Remove ephelper and other endpoints code.

appengine/ephelper/epfrontend/util.go

Index: appengine/ephelper/epfrontend/util.go
diff --git a/appengine/ephelper/epfrontend/util.go b/appengine/ephelper/epfrontend/util.go
deleted file mode 100644
index 12b67ccba482e5ebafbd1ddae8d1cdfee1cd6b25..0000000000000000000000000000000000000000
--- a/appengine/ephelper/epfrontend/util.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The Chromium 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 epfrontend
-
-import (
-	"strings"
-)
-
-func safeURLPathJoin(p ...string) string {
-	for i, v := range p {
-		p[i] = strings.Trim(v, "/")
-	}
-	return strings.Join(p, "/")
-}