omit version.

Author: arturobernalg

httpclient5/src/main/java/org/apache/hc/client5/http/impl/nio/DefaultAsyncClientConnectionOperator.java

@@ -78,8 +78,6 @@ public class DefaultAsyncClientConnectionOperator implements AsyncClientConnecti
      * only if you are prepared for incompatible changes in a future major
      * release.  Typical client code should use the high-level builders in
      * {@code HttpAsyncClients} instead.</p>
-     *
-     * @since 5.6
      */
     protected DefaultAsyncClientConnectionOperator(
             final Lookup<TlsStrategy> tlsStrategyLookup,