Drop support for the old spring-boot Gradle plugin ID

Closes gh-7859

spring-boot-integration-tests/spring-boot-gradle-tests/src/test/java/org/springframework/boot/gradle/DeprecatedPluginTests.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2012-2016 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.boot.gradle;
-
-import org.gradle.tooling.ProjectConnection;
-import org.junit.Rule;
-import org.junit.Test;
-
-import org.springframework.boot.test.rule.OutputCapture;
-
-/**
- * Tests for using the old, deprecated plugin ID.
- *
- * @author Andy Wilkinson
- */
-public class DeprecatedPluginTests {
-
-	private ProjectConnection project;
-
-	private static final String BOOT_VERSION = Versions.getBootVersion();
-
-	@Rule
-	public OutputCapture output = new OutputCapture();
-
-	@Test
-	public void deprecatedIdWorks() throws Exception {
-		this.project = new ProjectCreator().createProject("deprecated-plugin");
-		this.project.newBuild().forTasks("build")
-				.withArguments("-PbootVersion=" + BOOT_VERSION, "--stacktrace").run();
-	}
-
-}

spring-boot-integration-tests/spring-boot-gradle-tests/src/test/resources/deprecated-plugin.gradle

@@ -1,26 +0,0 @@
-buildscript {
-	repositories {
-		mavenLocal()
-	}
-	dependencies {
-		classpath("org.springframework.boot:spring-boot-gradle-plugin:${project.bootVersion}")
-	}
-}
-
-apply plugin: 'spring-boot'
-
-group = 'deprecated-plugin'
-version = '0.0.0'
-
-repositories {
-	mavenLocal()
-	mavenCentral()
-}
-
-springBoot {
-	mainClass 'com.example.Main'
-}
-
-dependencies {
-	compile 'org.springframework.boot:spring-boot-starter'
-}

spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/DeprecatedSpringBootPlugin.java

@@ -1,43 +0,0 @@
-/*
- * Copyright 2012-2016 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.boot.gradle.plugin;
-
-import org.gradle.api.Project;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * {@link SpringBootPlugin} subclass that outputs a deprecation warning to direct people
- * to use the new Gradle Plugin Portal-compatible ID {@code org.springframework.boot}.
- *
- * @author Andy Wilkinson
- * @deprecated as of 1.4.2 in favor of {@link SpringBootPlugin}
- */
-@Deprecated
-public class DeprecatedSpringBootPlugin extends SpringBootPlugin {
-
-	private static final Logger logger = LoggerFactory
-			.getLogger(DeprecatedSpringBootPlugin.class);
-
-	@Override
-	public void apply(Project project) {
-		logger.warn("The plugin id 'spring-boot' is deprecated. Please use "
-				+ "'org.springframework.boot' instead.");
-		super.apply(project);
-	}
-
-}

spring-boot-tools/spring-boot-gradle-plugin/src/main/resources/META-INF/gradle-plugins/spring-boot.properties

@@ -1 +0,0 @@
-implementation-class=org.springframework.boot.gradle.plugin.DeprecatedSpringBootPlugin