diff --git a/boards/um_feathers3.json b/boards/um_feathers3.json
index 42d4828..2be96cd 100644
--- a/boards/um_feathers3.json
+++ b/boards/um_feathers3.json
@@ -35,14 +35,6 @@
   ],
   "name": "Unexpected Maker FeatherS3",
   "upload": {
-    "arduino": {
-      "flash_extra_images": [
-        [
-          "0x410000",
-          "variants/um_feathers3/tinyuf2.bin"
-        ]
-      ]
-    },
     "flash_size": "16MB",
     "maximum_ram_size": 327680,
     "maximum_size": 16777216,