How to hide vertical sidebar from page?

ionic-v1
1

How to hide vertical sidebar from page when using scroll="true"

I tried following css but it would not help.

.scroll-bar-indicator
{
  display: none;
}
.ng-animate .scroll-bar {
  visibility: hidden !important;
}

.scroll-bar-fade-out{
  opacity:0 !important
}
::-webkit-scrollbar { 
    display: none; 
}