refactor: remove duplicate openPorts field from Router

Author: predic8

core/src/main/java/com/predic8/membrane/core/Router.java

@@ -91,15 +91,6 @@ public class Router implements Lifecycle, ApplicationContextAware, BeanRegistryA
      */
     private boolean openPorts = true;
 
-    /**
-     * Indicates whether the router should automatically open TCP ports when adding proxies.
-     * This flag determines if the ports associated with the proxies are opened immediately
-     * when they are added to the router. Setting this to {@code false} allows for proxies
-     * to be defined without opening the associated ports, providing more control over when
-     * the ports are made accessible.
-     */
-    private boolean openPorts = true;
-
     //
     // Configuration
     //