Fix JavaDoc 11 problem that is OK for Java 8

Author: idodeclare

opengrok-indexer/src/main/java/org/opengrok/indexer/search/Results.java

@@ -151,8 +151,7 @@ private static Reader getXrefReader(
      * <li>{@link SearchHelper#historyContext} (ignored if {@code null})</li>
      * <li>{@link SearchHelper#sourceContext} (ignored if {@code null})</li>
      * <li>{@link SearchHelper#summarizer} (if sourceContext is not
-     * {@code null})</li> <li>{@link SearchHelper#compressed} (if sourceContext
-     * is not {@code null})</li> <li>{@link SearchHelper#sourceRoot} (if
+     * {@code null})</li> <li>{@link SearchHelper#sourceRoot} (if
      * sourceContext or historyContext is not {@code null})</li> </ul>
      *
      * @param out write destination