Hi Aravind Prakash,

You may go to joomlafolder/components/com_komento/themes/kuro/profile/activities/reply.php

<?php // echo JText::_( 'COM_KOMENTO_ACTIVITY_REPLIED_IN' ); ?>
<?php // echo $activity->comment->componenttitle; ?>

By adding // into it, you will be able to achieve it.

By the way, it looks like you are using free version of Komento and in order for you to continue requesting for support, we would appreciate if you continue to subscription.
Thanks for understanding =D