refactor: OpenRewrite Recipe best practices

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.recipes.rewrite.OpenRewriteRecipeBestPractices?organizationId=T3BlblJld3JpdGU%3D

Co-authored-by: Moderne <team@moderne.io>

Author: timtebeek

src/main/java/org/openrewrite/java/dependencies/UpgradeDependencyVersion.java

@@ -21,10 +21,8 @@
 import lombok.RequiredArgsConstructor;
 import org.jspecify.annotations.Nullable;
 import org.openrewrite.*;
-import org.openrewrite.maven.tree.GroupArtifact;
 
 import java.util.List;
-import java.util.Set;
 
 import static java.util.Objects.requireNonNull;