The blue aura around the circle is something chrome specific. I think it can be turned off by using outline:0;
or failing that,
box-shadow:none;
However, to get rid of the bar (at least visually), I used:
border:none;
and
background:transparent;
on the class that was the slider (in that page's case, it was div.ui-slider
). That was all it took to get rid of it.