Drupal module to remove forgotten password link

password.module

<?php
// $Id$

/**
 * @file
 * Module to remove the forgotten password link
 */


/**
 * Implementation of hook_menu_alter().
 */
function password_menu_alter(&$items) {
  $items['user/password']['access callback'] = FALSE;
}

/**
 * Implementation of hook_form_alter().
 */
function password_form_alter(&$form, $form_state, $form_id) {

  if (($form_id == 'user_login_block' || $form_id == 'user_login')) {
    $index = array_search('user_login_final_validate', $form['#validate']);
    $form['#validate'][$index] = 'password_user_login_final_validate';
  }
  
}

/**
 * Remove forgotten password link in the error messages.
 */
function password_user_login_final_validate($form_id, &$form_state) {
  if (empty($form_state['uid'])) {
    // Always register an IP-based failed login event.
    flood_register_event('failed_login_attempt_ip', variable_get('user_failed_login_ip_window', 3600));
    // Register a per-user failed login event.
    if (isset($form_state['flood_control_user_identifier'])) {
      flood_register_event('failed_login_attempt_user', variable_get('user_failed_login_user_window', 21600), $form_state['flood_control_user_identifier']);
    }

    if (isset($form_state['flood_control_triggered'])) {
      if ($form_state['flood_control_triggered'] == 'user') {
        form_set_error('name', format_plural(variable_get('user_failed_login_user_limit', 5), 'Sorry, there has been more than one failed login attempt for this account. It is temporarily blocked. Try again later or <a href="@url">request a new password</a>.', 'Sorry, there have been more than @count failed login attempts for this account. It is temporarily blocked. Try again later.'));
      }
      else {
        // We did not find a uid, so the limit is IP-based.
        form_set_error('name', t('Sorry, too many failed login attempts from your IP address. This IP address is temporarily blocked. Try again later.'));
      }
    }
    else {
      form_set_error('name', t('Sorry, unrecognized username or password.'));
      watchdog('user', 'Login attempt failed for %user.', array('%user' => $form_state['values']['name']));
    }
  }
  elseif (isset($form_state['flood_control_user_identifier'])) {
    // Clear past failures for this user so as not to block a user who might
    // log in and out more than once in an hour.
    flood_clear_event('failed_login_attempt_user', $form_state['flood_control_user_identifier']);
  }
}

https://www.drupal.org/node/2356655