Brew MP 1.0.2
This function deletes an existing item from a menu model, releasing the memory occupied
by that item and its data content pointer.
[in] Pointer to the IMenuModel interface object.
[in] Indicates the zero-based index of the item to be removed from the menu model. The
first item in the model is indexed by 0, the second is indexed by 1, and so on. So,
if IMenuModel_DeleteAt() is called with 'i' equal to 2, item 2 will be removed from
the menu model, with items 3, 4, 5, etc all shifting one position lower.