There are Javascript methods, see the thread you duplicated.
A better solution is to set the target div to overflow:scroll, and wrap it inside a second element that is 8px narrower, who’s overflow:hidden.
The target element will have a hidden scrollbar. The mousewheel will work, but the scroll bar will not show.
<div style="overflow:hidden; width:200px;">
<div style="overflow:scroll; width:208px">
My mousewheel scrollable content here....
</div>
</div>
Note that 8px as the width of the scrollbar is a random number – it’s probably a lot more, and it could require per browser CSS.
Still better than JS in my book.