Hi
Try this
Go to templatesuberhtmlcom_userslogindefault_login.php
Find and comment out or Remove this code
<ul>
<li><a href="<?php echo JRoute::_('index.php?option=com_users&view=reset'); ?>">
<?php echo JText::_('COM_USERS_LOGIN_RESET'); ?></a></li>
<li><a href="<?php echo JRoute::_('index.php?option=com_users&view=remind'); ?>">
<?php echo JText::_('COM_USERS_LOGIN_REMIND'); ?></a></li>
<?php
$usersConfig = JComponentHelper::getParams('com_users');
if ($usersConfig->get('allowUserRegistration')) : ?>
<li><a href="<?php echo JRoute::_('index.php?option=com_users&view=registration'); ?>">
<?php echo JText::_('COM_USERS_LOGIN_REGISTER'); ?></a></li>
<?php endif; ?>
</ul>
Take a backup of original file before applying above changes .
Clear cache and check .