v1.0.0 to support Portenta_H7 Ethernet

### Initial Releases v1.0.0

1. Initial coding to support **Portenta_H7 boards** such as Portenta_H7 Rev2 ABX00042, etc., using [**ArduinoCore-mbed mbed_portenta** core](https://github.com/arduino/ArduinoCore-mbed) and `Vision-shield Ethernet`

Author: khoih-prog

README.md

@@ -74,10 +74,6 @@
   * [Methods for controlling websocket connections](#methods-for-controlling-websocket-connections)
   * [Adding Default Headers](#adding-default-headers)
   * [Path variable](#path-variable)
-* [HOWTO use STM32F4 with LAN8720](#howto-use-stm32f4-with-lan8720)
-  * [1. Wiring](#1-wiring)
-  * [2. HOWTO program using STLink V-2 or V-3](#2-howto-program-using-stlink-v-2-or-v-3)
-  * [3. HOWTO use Serial Port for Debugging](#3-howto-use-serial-port-for-debugging)
 * [Examples](#examples)
   * [1. For Vision-shield Ethernet](#1-for-Vision-shield-Ethernet)
     * [ 1. Async_AdvancedWebServer](examples/Ethernet/Async_AdvancedWebServer)