Removes the explicitly attached display image from a manual intake.

Only the display image is removed. The intake itself and its foods, recipes, quantities, nutritional information, timestamp and occasion are left unchanged.

After deletion, image_url falls back to the image that the intake would normally display when no explicit display image is attached.

Deletion is idempotent. If the intake does not currently have a display image, the endpoint still returns a successful response.

Display-image editing is supported only for manual-origin intakes.
Recognition and segmentation intakes cannot use this endpoint.

The caller must own the intake or be authorized to manage the APIUser that owns it.