Function delete_property 

pub fn delete_property<T>(
    target: &Object<T>,
    key: &JsValue,
) -> Result<bool, JsValue>
where
    Object<T>: ErasableGenericBorrow<Object<JsValue>> + EncodeTypeDef,
    for<'__wry_bindgen> &'__wry_bindgen Object<T>: BinaryEncode,

The static Reflect.deleteProperty() method allows to delete properties. It is like the delete operator as a function.

MDN documentation