diff --git a/examples/STM32_LAN8720/AsyncSimpleGET_STM32_LAN8720/hal_conf_extra.h b/examples/STM32_LAN8720/AsyncSimpleGET_STM32_LAN8720/hal_conf_extra.h
deleted file mode 100644
index a643ca6..0000000
--- a/examples/STM32_LAN8720/AsyncSimpleGET_STM32_LAN8720/hal_conf_extra.h
+++ /dev/null
@@ -1,7 +0,0 @@
-// Note: Must replace 
-// .arduino15/packages/STM32/hardware/stm32/1.9.0/system/STM32F4xx/stm32f4xx_hal_conf_default.h
-// as described in README.md
-
-#define HAL_ETH_MODULE_ENABLED
-
-#define LAN8742A_PHY_ADDRESS            0x01U