removed to integrate from base

app/services/user.js

@@ -13,7 +13,6 @@ const UserBlock = mongoose.model('UserBlock');
 
 const passport = require('passport');
 const PassportLocal = require('passport-local');
-const OAuth2Strategy = require('passport-oauth2');
 
 const striptags = require('striptags');
 const uuidv4 = require('uuid').v4;
@@ -41,7 +40,6 @@ class UserService {
   async start ( ) {
     this.log.info(`starting ${module.exports.name} service`);
     this.registerPassportLocal();
-    this.registerPassportOAuth2();
     if (process.env.DTP_ADMIN === 'enabled') {
       this.registerPassportAdmin();
     }
@@ -338,25 +336,6 @@ class UserService {
     }
   }
 
-  registerPassportOAuth2 ( ) {
-    const AUTH_HOST = process.env.DTP_CORE_AUTH_HOST || 'localhost';
-    const oauthOptions = {
-      authorizationURL: `https://${AUTH_HOST}/oauth2/authorize`,
-      tokenURL: `https://${AUTH_HOST}/oauth2/token`,
-      clientID: process.env.DTP_CORE_CLIENT_ID,
-      clientSecret: process.env.DTP_CORE_CLIENT_SECRET,
-      callbackURL: `http://${process.env.DTP_SITE_DOMAIN}/auth/example/callback`,
-    };
-    passport.use(new OAuth2Strategy(oauthOptions, this.handleOAuth2Login.bind(this)));
-  }
-
-  async handleOAuth2Login (accessToken, refreshToken, profile, cb) {
-    this.log.info('OAuth2 login', { accessToken, refreshToken, profile });
-    User.findOrCreate({ exampleId: profile.id }, function (err, user) {
-      return cb(err, user);
-    });
-  }
-
   registerPassportAdmin ( ) {
     const options = {
       usernameField: 'username',