diff --git a/buildroot/share/PlatformIO/boards/at90USB1286.json b/buildroot/share/PlatformIO/boards/at90USB1286.json
deleted file mode 100644
index f8d82d123..000000000
--- a/buildroot/share/PlatformIO/boards/at90USB1286.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-  "build": {
-    "core": "teensy",
-    "extra_flags": "-DTEENSY2PP",
-    "f_cpu": "16000000L",
-    "mcu": "at90usb1286"
-  },
-  "frameworks": [
-    "arduino"
-  ],
-  "name": "at90USB1286.json",
-  "upload": {
-    "maximum_ram_size": 8192,
-    "maximum_size": 122880,
-    "require_upload_port": true,
-    "protocol": ""
-  },
-  "url": "https://github.com/MarlinFirmware/Marlin",
-  "vendor": "various"
-}