refactor: sanitize javadoc

null-object/src/test/java/com/iluwatar/nullobject/NullNodeTest.java

@@ -32,9 +32,8 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 
 /**
- * Date: 12/26/15 - 11:47 PM
+ * NullNodeTest
  *
- * @author Jeroen Meulemeester
  */
 class NullNodeTest {
 

null-object/src/test/java/com/iluwatar/nullobject/TreeTest.java

@@ -40,9 +40,8 @@ import org.junit.jupiter.api.Test;
 import org.slf4j.LoggerFactory;
 
 /**
- * Date: 12/26/15 - 11:44 PM
+ * TreeTest
  *
- * @author Jeroen Meulemeester
  */
 class TreeTest {