Want to delete color set beside legend label

[mononomo]

Hello everyone, I have some problem with my Horizontal Chart. I want to close the color beside a legend below chart but I can't find a way to delete it.

Is it has a way to close it or can't. Thank you.

[liuxuan30]

please check drawForm(), if

        /// Avoid drawing a form
        case none
        
        /// Do not draw the a form, but leave space for it
        case empty

suits you