remove duplicate entry

Author: Jason2866

platform.json

@@ -126,11 +126,6 @@
        "owner": "",
        "version": "https://github.com/pioarduino/registry/releases/download/0.0.1/esp-rom-elfs-20241011.zip"
     },
-    "tool-esp-rom-elfs": {
-       "optional": true,
-       "owner": "",
-       "version": "https://github.com/pioarduino/registry/releases/download/0.0.1/esp-rom-elfs-20241011.zip"
-    },
     "tool-mklittlefs": {
       "type": "uploader",
       "optional": true,