Revert "Increase jetty maxIdleTime"

This reverts commit d0d626e.

Author: smola

dd-java-agent/instrumentation/servlet/request-3/src/test/groovy/JettyServlet3Test.groovy

@@ -50,14 +50,6 @@ abstract class JettyServlet3Test extends AbstractServlet3Test<Server, ServletCon
     JettyServer() {
       server.connectors.each {
         it.setHost('localhost')
-        // Set high idle timeout to avoid SocketClosed on JettyServlet3ServeFromAsyncTimeout, JettyServlet3TestAsyncDispatchOnAsyncTimeout in CI.
-        def methods = it.getClass().getDeclaredMethods().collect { it.name }.toSet()
-        if (methods.contains("setMaxIdleTime")) {
-          // Deprecated method, not available in newer versions.
-          it.setMaxIdleTime(30000)
-        } else {
-          it.setIdleTimeout(30000L)
-        }
       }
 
       ServletContextHandler servletContext = new ServletContextHandler(null, "/$context", ServletContextHandler.SESSIONS)