function plt_hide_media_sync_menus() {
//Hide the "Media → Media Sync" menu.
remove_submenu_page('upload.php', 'media-sync-page');
//Hide the "Settings → Media Sync" menu.
remove_submenu_page('options-general.php', 'media-sync-options');
}
add_action('admin_menu', 'plt_hide_media_sync_menus', 11);