1. create and add empty child to canvas
2. in the inspector of the child object right click on the rect transform component and select remove component

result: rect transform is removed but produces error spam of:

Reset has not been called 'GameObject' (Transform). Figure out where the object gets created and call Reset correctly.

Note: of you do this for toggle you get additional error spam of

NullReferenceException: Object reference not set to an instance of an object
UnityEngine.UI.Selectable.GetPointOnRectEdge (UnityEngine.RectTransform rect, Vector2 dir)