Remove image argument in ray maple pipeline

[longshuicy]

The Argument in ray maple is confusing. Its value actually not being used, instead the pipeline is running on all the image belongs to INPUT_IMAGE_DIR

    # Optional Arguments
    parser.add_argument(
        "--image",
        required=False,
        default="test_image_01.tif",
        metavar="<command>",
        help="Image name",
    )