Specifying the default board file is redundant (#20807)

keyboards/akb/vero/info.json

@@ -3,7 +3,6 @@
     "keyboard_name": "Vero",
     "maintainer": "arnstadm",
     "bootloader": "stm32-dfu",
-    "board": "GENERIC_STM32_F411XE",
     "diode_direction": "COL2ROW",
     "features": {
         "bootmagic": true,

keyboards/ebastler/e80_1800/info.json

@@ -5,7 +5,6 @@
     "url": "https://mpwr.xyz/projects/e80-1800.html",
     "bootloader": "stm32-dfu",
     "processor": "STM32F072",
-    "board": "GENERIC_STM32_F072XB",
     "usb": {
         "vid": "0x6562",
         "pid": "0x1338",

keyboards/teleport/native/info.json

@@ -5,7 +5,6 @@
     "url": "https://nvil.gg",
     "bootloader": "stm32-dfu",
     "processor": "STM32F411",
-    "board": "GENERIC_STM32_F411XE",
     "usb": {
         "vid": "0x7470",
         "device_version": "1.0.0",