MediaPlayerInterfaceRemoveImagesMessage

Remove images from the slideshow that show-images started, by their 1-based positions in it, as now-playing queuePosition counts them. The endpoint ignores the request when no slideshow shows or a position is past its end; removing every image stops the slideshow. A SUCCEEDED result means the command was delivered; confirm with endpoint_query expand media-player and forceDeviceAttributeQuery true, where now-playing queueLength shrinks.