The one in the content area is the social icon sharing system built into PageLines. The one on the sidebar is brought to you courtesy of the Sharedaddy plugin. Our sharing icons from the content area cannot be placed in the sidebar automatically. You can only do this by manually adding them via shortcode or, by plugins which may place them there in widgets you apply to the sidebar. In this case, Sharedaddy.
Check Dashboard > Appearance > Widgets for that sidebar and I'm sure you'll see the appropriate widget. If you remove it, they'll disappear and if you replace it, they'll reappear. Check the plugin's support or settings for options to turn them off.