Remove title from content

Hello, I would like to remove the page title from the main content. It doesn't  look good if the title is repeated in the main content. Like here: http://www.fhh-sos-animaux.com/?page_id=725&lang=en

I can't find the " <h1 class="post-title"><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h1>

"

There is in the content.php tow entries, but I try whit no success to change it... Thanks for your help