Remove ephelper and other endpoints code.

appengine/apigen_examples/dumb_counter/dumbCounter/service_cas.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 dumbCounter
-
-import (
-        "github.com/GoogleCloudPlatform/go-endpoints/endpoints"
-        dstore "github.com/luci/gae/service/datastore"
-        "golang.org/x/net/context"
-)
-
-// CASReq is the input for the CAS RPC
-type CASReq struct {
-        Name string `endpoints:"required"`
-
-        OldVal int64 `json:",string"`
-        NewVal int64 `json:",string"`
-}
-
-// CAS does an atomic compare-and-swap on a counter.
-func (e *Example) CAS(c context.Context, r *CASReq) (err error) {
-        c, err = e.Use(c, casMethodInfo)
-        if err != nil {
-                return
-        }
-
-        success := false
-        err = dstore.Get(c).RunInTransaction(func(c context.Context) error {
-                ds := dstore.Get(c)
-                ctr := &Counter{Name: r.Name}
-                if err := ds.Get(ctr); err != nil {
-                        return err
-                }
-                if ctr.Val == r.OldVal {
-                        success = true
-                        ctr.Val = r.NewVal
-                        return ds.Put(ctr)
-                }
-                success = false
-                return nil
-        }, nil)
-        if err == nil && !success {
-                err = endpoints.ConflictError
-        }
-        return
-}
-
-var casMethodInfo = &endpoints.MethodInfo{
-        Path: "counter/{Name}/cas",
-        Desc: "Compare and swap a counter value",
-}