I used Zen Cart back in 2006, but have had no need of it since 2008 - until now

I have installed this template but want to remove the Social Sidebar.

In the instructions it says
In your favorite plain text editor open includes/templates/sheffield_blue/css/stysheet_social_header.css

At the bottom of the file add display:none; to the class for each icon you don't want to display.
I do not have this file - so assume it is referring to /includes/templates/sheffield_blue/css/stylesheet_social_sidebar.css.

However modifying this does not seem to remove (hide) the sidebar.

This is what I tried
.sidebar{background:#e3e9ff;-moz-border-radius:10px;border:3px solid #bbccff;position:fixed;cursorointer;}
.sidebar-words{color:#000000;font-weight:bold;font-family:helvetica;list-style:none;padding:0px;}
.soico{margin-right:2px;margin-bottom:5px;margin-top:5px;width:40px;}
.youtube-sh{display:none;}
.blog-sh{display:none;}
.google-sh{display:none;}
I also tried it without the '-sh' as this is excluded in the example in the instructions - this didn't work either.

Can anyone enlighten me as to what I am missing here.

Thanks.