Remove gradle metadata publish

- Remove broken metadata module files to possibly
  bring those back when concept is more useful and
  easier to setup/test.
- Fixes #521

buildSrc/src/main/java/org/springframework/shell/gradle/ArtifactoryConventions.java

@@ -21,6 +21,7 @@ import java.util.Map;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.plugins.PluginManager;
+import org.gradle.api.publish.tasks.GenerateModuleMetadata;
 import org.jfrog.build.extractor.clientConfiguration.ArtifactSpec;
 import org.jfrog.build.extractor.clientConfiguration.ArtifactSpecs;
 import org.jfrog.gradle.plugin.artifactory.ArtifactoryPlugin;
@@ -35,6 +36,10 @@ public class ArtifactoryConventions {
 		PluginManager pluginManager = project.getPluginManager();
 		pluginManager.apply(ArtifactoryPlugin.class);
 
+		project.getTasks().withType(GenerateModuleMetadata.class, metadata -> {
+			metadata.setEnabled(false);
+		});
+
 		project.getPlugins().withType(ArtifactoryPlugin.class, artifactory -> {
 			Task task = project.getTasks().findByName(ArtifactoryTask.ARTIFACTORY_PUBLISH_TASK_NAME);
 			if (task != null) {

buildSrc/src/main/java/org/springframework/shell/gradle/DocsPlugin.java

@@ -36,6 +36,7 @@ import org.gradle.api.Project;
 import org.gradle.api.plugins.JavaLibraryPlugin;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.PluginManager;
+import org.gradle.api.publish.tasks.GenerateModuleMetadata;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.dsl.RepositoryHandler;
 import org.gradle.api.file.CopySpec;
@@ -57,6 +58,10 @@ class DocsPlugin implements Plugin<Project> {
 		pluginManager.apply(AsciidoctorJPlugin.class);
 
 		configureAdocPlugins(project);
+
+		project.getTasks().withType(GenerateModuleMetadata.class, metadata -> {
+			metadata.setEnabled(false);
+		});
 	}
 
 	private void configureAdocPlugins(Project project) {