Restore all movie titles including movie date to simple movie title.

fix_movies.php

<?php
/**
 * Restore all movie titles including movie date to simple movie title.
 *
 * @package WordPress
 */

require( dirname( __FILE__ ) . '/wp-blog-header.php' );

$query = new WP_Query(
	array(
		'post_type' => 'movie',
		'posts_per_page' => -1
	)
);

if ( $query->have_posts() ) :
	while ( $query->have_posts() ) :
		$query->the_post();

		$meta = get_post_meta( $post->ID, '_wpml_movie_data', $single = true );
		if ( isset( $meta['meta']['release_date'] ) && '' != $meta['meta']['release_date'] ) :

			$date = $meta['meta']['release_date'];
			$date = date_i18n( 'Y', strtotime( $date ) );

			// Make sure this movie has been updated before
			if ( " ($date)" == substr( $post->post_title, -7 ) ) :

				$post->post_title = substr( $post->post_title, 0, -7 );

				$update = wp_update_post( $post, $wp_error = true );
				if ( is_wp_error( $update ) )
					printf( '"%s": %s<br />', $post->post_title, $update->get_error_message() );
				else
					printf( '"%s" update successfully!<br />', $post->post_title );
			endif;

		endif;
	endwhile;
endif;