HTML markup can be generated in several ways:
- directly included in theme’s template files;
- generated by template tags in templates;
- generated by native or plugin functions attached to hooks.
From quick look at this specific theme’s code I found this:
array( "name" => "Socialize Icons",
"desc" => "Enter Links to Your Twitter, Facebook, and RSS feeds.<br />If you want to remove the icon, clear the field and save this page",
"type" => "socialize_icons"),
Which makes me think it has theme options page, where you can change or make blank those fields.