Disable deprecated media library tab

gistfile1.aw

<?php

/**
 * Implements hook_media_browser_plugin_info_alter().
 */
function custom_media_browser_plugin_info_alter(&$info) {
  unset($info['library']);
}

/**
 * Implements hook_views_default_views_alter().
 */
function custom_views_default_views_alter(&$views) {
  $views['media_default']->display['media_browser_1']->display_options['title'] = t('Library');
}