Depending on the structure of your theme this may be different for you. With my framework I have a single.php file and the loop is inside a content-single.php file. This loop file is called within the single.php and in that section it contains my author box.
I accomplished removing the author box by creating a page single-ai1ec_event.php and inside that I called a new content-ai1ec_event.php that does not have the author box. If your author box is directly on your single.php template, then just remove it from single-ai1ec_event.php. Hope that helps!