In your template's directory, edit your

catalog/templates/TMPLATNAME/content/product_info.tpl.php to remove both occurrences of '. TEXT_CLICK_TO_ENLARGE',

and

In
catalog/includes/modules/dynamic_mopics.php, comment out the last line of code:

echo '<p class="noScreenshots"><span class="smallText">' . TEXT_NO_MOPICS . '</span></p>';

Always make backups, your mileage may vary, etc.