apply github-actions suggestion

Author: zakaria-shahen

src/main/java/org/openrewrite/java/migrate/lombok/FieldAnnotator.java

@@ -27,7 +27,6 @@
 import org.openrewrite.java.tree.JavaType;
 
 import java.util.List;
-import java.util.stream.Collectors;
 
 import static java.util.Comparator.comparing;
 import static java.util.stream.Collectors.joining;