Remove some remnants of the embedded launch script support

See gh-47666

Author: wilkinsona

build-plugin/spring-boot-gradle-plugin/src/dockerTest/java/org/springframework/boot/gradle/tasks/bundling/BootBuildImageIntegrationTests.java

@@ -306,21 +306,6 @@ void buildsImageWithTag() throws IOException {
 		removeImages(projectName, "example.com/myapp:latest");
 	}
 
-	@TestTemplate
-	void buildsImageWithLaunchScript() throws IOException {
-		writeMainClass();
-		writeLongNameResource();
-		BuildResult result = this.gradleBuild.build("bootBuildImage");
-		String projectName = this.gradleBuild.getProjectDir().getName();
-		BuildTask task = result.task(":bootBuildImage");
-		assertThat(task).isNotNull();
-		assertThat(task.getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
-		assertThat(result.getOutput()).contains("docker.io/library/" + projectName);
-		assertThat(result.getOutput()).contains("---> Test Info buildpack building");
-		assertThat(result.getOutput()).contains("---> Test Info buildpack done");
-		removeImages(projectName);
-	}
-
 	@TestTemplate
 	void buildsImageWithNetworkModeNone() throws IOException {
 		writeMainClass();

build-plugin/spring-boot-gradle-plugin/src/dockerTest/resources/org/springframework/boot/gradle/tasks/bundling/BootBuildImageIntegrationTests-buildsImageWithLaunchScript.gradle

@@ -53,11 +53,6 @@ protected String buildLog(File project) {
 		return contentOf(new File(project, "target/build.log"));
 	}
 
-	protected String launchScript(File jar) {
-		String content = contentOf(jar);
-		return content.substring(0, content.indexOf(new String(new byte[] { 0x50, 0x4b, 0x03, 0x04 })));
-	}
-
 	protected AssertProvider<JarAssert> jar(File file) {
 		return new AssertProvider<>() {
 

build-plugin/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/AbstractArchiveIntegrationTests.java

@@ -57,7 +57,6 @@ void whenJarIsRepackagedInPlaceOnlyRepackagedJarIsInstalled(MavenBuild mavenBuil
 			File original = new File(project, "target/jar-0.0.1.BUILD-SNAPSHOT.jar.original");
 			assertThat(original).isFile();
 			File repackaged = new File(project, "target/jar-0.0.1.BUILD-SNAPSHOT.jar");
-			assertThat(launchScript(repackaged)).isEmpty();
 			assertThat(jar(repackaged)).manifest((manifest) -> {
 				manifest.hasMainClass("org.springframework.boot.loader.launch.JarLauncher");
 				manifest.hasStartClass("some.random.Main");

build-plugin/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/JarIntegrationTests.java

@@ -60,7 +60,6 @@
 	<suppress files="ValidatorPropertiesWithDefaultValues\.java" checks="SpringMethodVisibility" />
 	<suppress files="DevToolsTestApplication\.java" checks="SpringMethodVisibility" />
 	<suppress files="DevToolsR2dbcAutoConfigurationTests" checks="HideUtilityClassConstructor" />
-	<suppress files="AbstractLaunchScriptIntegrationTests" checks="IllegalImport" />
 	<suppress files="FailureAnalyzers\.java" checks="RedundantModifier" />
 	<suppress files="SpringBootVersion" checks="JavadocPackage" />
 	<suppress files="SpringBootProviderVersion" checks="JavadocPackage" />