Merge branch 'fix/wifi_docs_remove_nonexistent_lwip_opt' into 'master'

fix(wifi): Remove non-existent LWIP option from docs

See merge request espressif/esp-idf!34055

docs/en/api-guides/wifi.rst

@@ -275,7 +275,7 @@ Another thing that deserves attention is that the default behavior of LwIP is to
 - Five seconds later, the Wi-Fi connection is restored because :cpp:func:`esp_wifi_connect()` is called in the application event callback function. **Moreover, the station connects to the same AP and gets the same IPV4 address as before**.
 - Sixty seconds later, when the application sends out data with the keep-alive socket, the socket returns an error and the application closes the socket and re-creates it when necessary.
 
-In above scenarios, ideally, the application sockets and the network layer should not be affected, since the Wi-Fi connection only fails temporarily and recovers very quickly. The application can enable "Keep TCP connections when IP changed" via LwIP menuconfig.
+In above scenarios, ideally, the application sockets and the network layer should not be affected, since the Wi-Fi connection only fails temporarily and recovers very quickly.
 
 IP_EVENT_STA_GOT_IP
 ++++++++++++++++++++++++++++++++++++

docs/zh_CN/api-guides/wifi.rst

@@ -275,7 +275,7 @@ WIFI_EVENT_STA_DISCONNECTED
 - 5 秒后，因为在应用程序的事件回调函数中调用了 :cpp:func:`esp_wifi_connect()`，Wi-Fi 连接恢复。**同时，station 连接至同一个 AP 并获得与之前相同的 IPV4 地址。**
 - 60 秒后，当应用程序发送具有保持活动状态的套接字的数据时，套接字将返回错误，应用程序将关闭套接字并在必要时重新创建。
 
-在上述场景中，理想状态下应用程序套接字和网络层将不会受到影响，因为在此过程中 Wi-Fi 连接只是短暂地断开然后快速恢复。应用程序可通过 LwIP menuconfig 启动“IP 改变时保持 TCP 连接”的功能。
+在上述场景中，理想状态下应用程序套接字和网络层将不会受到影响，因为在此过程中 Wi-Fi 连接只是短暂地断开然后快速恢复。
 
 IP_EVENT_STA_GOT_IP
 ++++++++++++++++++++++++++++++++++++