TC Headings Error

I have this error at the bottom of each of my posts. I’ve gone into goDaddy and can find nothing where it shows to look that could be causing this error – help!!! Thanks.

Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘TC_headings’ does not have a method ‘tc_content_headings’ in /home/content/91/11903191/html/wp-includes/plugin.php on line 505