Revert "优化服务退出流程，增加中间件文档"

This reverts commit c511a2e6b3.

server/internal/library/network/tcp/client.go

@@ -195,9 +195,7 @@ func (client *Client) connect() {
 reconnect:
 	conn := client.dial()
 	if conn == nil {
-		if !client.stopFlag {
-			client.Logger.Debugf(client.Ctx, "client dial failed")
-		}
+		client.Logger.Debugf(client.Ctx, "client dial failed")
 		return
 	}
 
@@ -313,11 +311,6 @@ func (client *Client) Stop() {
 	client.Close()
 }
 
-// IsStop 是否已停止
-func (client *Client) IsStop() bool {
-	return client.stopFlag
-}
-
 // Destroy 销毁当前连接
 func (client *Client) Destroy() {
 	client.stopCron()