`elm_interface_scrollable` is replaced with `efl_ui_scrollable_interative`.
Legacy code related to `SCROLL` event is removed because eo `SCROLL` event have
`void` event info.
```
in lib/efl/inferfaces/efl_ui_scrollable.eo
scroll: void; [[Called when scrolling]]
```
I think we need to add new `PANEL_SCROLL` event that have `Efl_Ui_Panel_Scroll_Info`
Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D9637