remove(esp_eth): Removed SPI ETH ENC28J60 example

Author: kostaond

docs/en/api-reference/network/esp_eth.rst

@@ -538,8 +538,6 @@ Application Examples
 
   * :example:`ethernet/iperf` demonstrates how to use the Ethernet capabilities to measure the throughput/bandwidth using iPerf.
 
-  * :example:`ethernet/enc28j60` demonstrates how to use the ENC28J60 Ethernet controller by integrating a new Ethernet MAC driver into the `esp_eth` component and attaching it to the TCP/IP stack.
-
   * :example:`network/vlan_support` demonstrates how to create virtual network interfaces over Ethernet, including VLAN and non-VLAN interfaces.
 
   * :example:`network/sta2eth` demonstrates how to create a 1-to-1 bridge using a Wi-Fi station and a wired interface such as Ethernet or USB.

docs/zh_CN/api-reference/network/esp_eth.rst

@@ -538,8 +538,6 @@ ESP-IDF 在宏 :c:macro:`ETH_DEFAULT_CONFIG` 中为安装驱动程序提供了
 
   * :example:`ethernet/iperf` 演示了如何使用以太网功能，使用 iPerf 测量吞吐量/带宽。
 
-  * :example:`ethernet/enc28j60` 演示了如何使用 ENC28J60 以太网控制器，通过将新的以太网 MAC 驱动程序集成到 ``esp_eth`` 组件中，并将其连接到 TCP/IP 栈。
-
   * :example:`network/vlan_support` 演示了如何在以太网上创建虚拟网络接口，包括 VLAN 和非 VLAN 接口。
 
   * :example:`network/sta2eth` 演示了如何使用 Wi-Fi station 和有线接口（如以太网或 USB）创建 1 对 1 的桥接。

examples/ethernet/.build-test-rules.yml

@@ -15,15 +15,6 @@ examples/ethernet/basic:
     - esp_driver_gpio
     - esp_driver_spi
 
-examples/ethernet/enc28j60:
-  depends_components:
-    - esp_eth
-    - esp_netif
-    - lwip
-    - esp_event
-    - esp_driver_gpio
-    - esp_driver_spi
-
 examples/ethernet/iperf:
   disable_test:
     - if: IDF_TARGET not in ["esp32"]