Remove GlobalAuthenticationConfigurerAdapter from oauth2Login sample

Fixes gh-4665

samples/boot/oauth2login/src/main/java/org/springframework/security/config/annotation/authentication/configurers/GlobalAuthenticationConfigurerAdapter.java

@@ -1,48 +0,0 @@
-/*
- * Copyright 2002-2017 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.config.annotation.authentication.configurers;
-
-import org.springframework.core.annotation.Order;
-import org.springframework.security.authentication.AuthenticationManager;
-import org.springframework.security.config.annotation.SecurityConfigurer;
-import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
-
-/**
- * <b>NOTE:</b>
- * This class is here as a TEMPORARY FIX in order to force
- * <code>@ConditionalOnClass(GlobalAuthenticationConfigurerAdapter.class)</code> in
- * <code>org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration</code>.
- * <p>
- * Spring Boot M5 expects GlobalAuthenticationConfigurerAdapter to be located in package
- * <code>org.springframework.security.config.annotation.authentication.configurers</code>.
- * However, it's recently been moved to
- * <code>org.springframework.security.config.annotation.authentication.configuration</code>
- * resulting in <code>SecurityAutoConfiguration</code> <b>NOT</b> being triggered.
- * <p>
- * This class should be removed after a fix has been applied to Spring Boot M6 or RC1.
- *
- * @author Joe Grandja
- */
-@Order(100)
-public abstract class GlobalAuthenticationConfigurerAdapter implements
-	SecurityConfigurer<AuthenticationManager, AuthenticationManagerBuilder> {
-
-	public void init(AuthenticationManagerBuilder auth) throws Exception {
-	}
-
-	public void configure(AuthenticationManagerBuilder auth) throws Exception {
-	}
-}