Delete all the frames open in the image viewer.
Delete all the frames - in other words, images - being displayed in the image viewer (e.g. as created by `image_data` or `image_fit` ).
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
- load_image, pack_image, unpack_image
- image_model, image_model_component, image_source, image_source_component
- contour, contour_data, contour_model, contour_ratio, contour_resid, image_close, image_data, image_fit, image_getregion, image_open, image_ratio, image_resid, image_setregion, image_xpaget, image_xpaset