Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: timtebeek

rewrite-java-tck/src/main/java/org/openrewrite/java/tree/TypeUtilsTest.java

@@ -15,7 +15,6 @@
  */
 package org.openrewrite.java.tree;
 
-import org.jetbrains.annotations.NotNull;
 import org.junit.jupiter.api.Test;
 import org.openrewrite.ExecutionContext;
 import org.openrewrite.InMemoryExecutionContext;
@@ -1432,9 +1431,9 @@ abstract class ExtT<T> extends CompT<ExtT<T>> {}
     void recursiveTypes() {
         CompT<?> compT;
         CompT<ExtT<Integer>> compExtT;
-        ExtT<Integer> extT = new ExtT<Integer>() {
+        ExtT<Integer> extT = new ExtT<>() {
             @Override
-            public int compareTo(@NotNull TypeUtilsTest.ExtT<Integer> o) {
+            public int compareTo(TypeUtilsTest.ExtT<Integer> o) {
                 return 0;
             }
         };