Hide additional information tab chrome

Hi,

I want to hide the additional information tab and used your recommended shortcode that you provided to another forum post:

.upcp-tabbed-addtl-info-menu, .upcp-tabbed-addtl-info {
display: none;
}

It works on Firefox but does not remove it on chrome and now it is just a blank tab.

Any further help you could offer would be greatly appreciated.

Thank You