You can disable the social links tools by opening your blog posts control for edit and go to step 3 Settings. There disable the Social bookmarks (del.icio.us, digg, reddit) checkbox and publish the page with your blog posts widget. This will make the blog posts control not add the social media plugins.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items