qmk/data/constants/keycodes/keycodes_0.0.6_quantum.hjson

{
    "keycodes": {
        "0x7C20": "!delete!", // old QK_OUTPUT_AUTO
        "0x7C21": "!delete!", // old QK_OUTPUT_USB
        "0x7C22": "!delete!", // old QK_OUTPUT_BLUETOOTH
    }
}