Fatal Error (Social Links)

I am new to wordpress and downloaded a widget that gave me this. Now I can’t get back in to deactivate it.

Any thoughts would be great. Thanks!

Paul

Fatal error: Cannot redeclare addheadercode() (previously declared in /home/content/b/u/s/bustours/html/PaulEMcGarry/wp-content/plugins/CaffeinatedContent/CaffeinatedContent.php:101) in /home/content/b/u/s/bustours/html/PaulEMcGarry/wp-content/plugins/social-links/sociallinks.php on line 314