Remove ephelper and other endpoints code.

appengine/ephelper/middleware.go

-// 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 ephelper
-
-import (
-        "github.com/GoogleCloudPlatform/go-endpoints/endpoints"
-        gaeauth "github.com/luci/luci-go/appengine/gaeauth/server"
-        "github.com/luci/luci-go/appengine/gaemiddleware"
-        "github.com/luci/luci-go/server/auth"
-        "golang.org/x/net/context"
-)
-
-// Middleware is a Context manipulation function that is called when
-// initializing a ServiceBase.
-type Middleware func(context.Context) (context.Context, error)
-
-// TestMode is a no-op middleware layer.
-var TestMode = []Middleware{}
-
-// DefaultMiddleware is the default middleware stack for a ServiceBase. It:
-//
-//   - Installs the AppEngine production service base from
-//     gaemiddleware.WithProd.
-//   - Installs and authenticates the using the Authenticator methods from the
-//     ServiceBase.
-func DefaultMiddleware(a auth.Authenticator) Middleware {
-        return func(c context.Context) (context.Context, error) {
-                c = gaemiddleware.WithProd(c, endpoints.HTTPRequest(c))
-
-                a := a
-                if a == nil {
-                        mi := MethodInfo(c)
-                        a = auth.Authenticator{
-                                &gaeauth.OAuth2Method{Scopes: mi.Scopes},
-                        }
-                }
-                c = auth.SetAuthenticator(c, a)
-                return a.Authenticate(c, endpoints.HTTPRequest(c))
-        }
-}