Remove obsolete UnauthenticatedAccessExample

See gh-17614

spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/web/security/UnauthenticatedAccessExample.java

@@ -1,53 +0,0 @@
-/*
- * Copyright 2012-2019 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
- *
- *      https://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.boot.docs.web.security;
-
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.builders.WebSecurity;
-import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
-
-/**
- * Example configuration for using a {@link WebSecurityConfigurerAdapter} to configure
- * unauthenticated access to the home page at "/".
- *
- * @author Robert Stern
- */
-public class UnauthenticatedAccessExample {
-
-	/**
-	 * {@link WebSecurityConfigurerAdapter} that provides init to configure
-	 * {@link WebSecurity} argument to customize access rules.
-	 */
-	// tag::configuration[]
-	@Configuration(proxyBeanMethods = false)
-	static class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
-
-		@Override
-		public void init(WebSecurity web) {
-			web.ignoring().antMatchers("/");
-		}
-
-		@Override
-		protected void configure(HttpSecurity http) throws Exception {
-			http.antMatcher("/**").authorizeRequests().anyRequest().authenticated();
-		}
-
-	}
-	// end::configuration[]
-
-}