fix incorrect assignment

hippo4j-adapter/hippo4j-adapter-dubbo/src/main/java/cn/hippo4j/adapter/dubbo/DubboThreadPoolAdapter.java

@@ -58,7 +58,6 @@ public class DubboThreadPoolAdapter implements ThreadPoolAdapter, ApplicationLis
             return threadPoolAdapterState;
         }
         threadPoolAdapterState.setThreadPoolKey(identify);
-        threadPoolAdapterState.setActive(executor.getActiveCount() + "");
         threadPoolAdapterState.setCoreSize(executor.getCorePoolSize());
         threadPoolAdapterState.setMaximumSize(executor.getMaximumPoolSize());
         return threadPoolAdapterState;