Issue ota4j-team#21: AssertionFailedException - JavaDoc

Adjust Javadoc as the statements about actual/expected values are
not valid anymore.

src/main/java/org/opentest4j/AssertionFailedException.java

@@ -17,20 +17,22 @@
 package org.opentest4j;
 
 import org.opentest4j.debug.DebugInformation;
-import org.opentest4j.debug.ValueDescriptor;
 
 /**
- * {@code AssertionFailedError} is an <em>initial draft</em> for a common base class for test-related
- * {@link AssertionError AssertionErrors}.
  * <p>
- * In addition to a message and a cause this class stores the expected and actual values of an assertion using the
- * {@link ValueDescriptor} type.
+ * {@code AssertionFailedException} is an <em>initial draft</em> for a common base class for test-related assertion
+ * failures.
+ * </p>
+ * <dl>
+ * <dt><strong>WARNING:</strong></dt>
+ * <dd>this is a <em>work in progress</em> and is therefore guaranteed to undergo heavy revisions in the near future
+ * based on community feedback.</dd>
+ * </dl>
  * <p>
- * <strong>WARNING</strong>: this is a <em>work in progress</em> and is therefore guaranteed to undergo heavy revisions
- * in the near future based on community feedback.
  *
  * @author Sam Brannen
  * @author Marc Philipp
+ * @author Mark Michaelis
  * @since 1.0
  */
 public class AssertionFailedException extends DebuggableException {