Polish buildSrc

Author: wilkinsona

buildSrc/src/main/java/org/springframework/restdocs/build/optional/OptionalDependenciesPlugin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2021 the original author or authors.
+ * Copyright 2014-2022 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.
@@ -22,9 +22,6 @@
 import org.gradle.api.attributes.Usage;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
-import org.gradle.api.publish.PublishingExtension;
-import org.gradle.api.publish.maven.MavenPublication;
-import org.gradle.api.publish.maven.plugins.MavenPublishPlugin;
 import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.javadoc.Javadoc;
 import org.gradle.plugins.ide.eclipse.EclipsePlugin;