How do I get rid of the whole string?

I have searched many php files but I dont know what is generating the code to display the string.
Any css workaround will also be fine.
Please help.
<?php echo JText::_('K2_WEBSITE_URL'); ?>: <a href="<?php echo $this->user->profile->url; ?>" target="_blank" rel="me"><?php echo $this->user->profile->url; ?></a>
<?php if(!empy($this->user->profile->url)): ?>
<?php echo JText::_('K2_WEBSITE_URL'); ?>: <a href="<?php echo $this->user->profile->url; ?>" target="_blank" rel="me"><?php echo $this->user->profile->url; ?></a>
<?php endif; ?>