Remove Yoast SEO metabox from a custom post type.

remove-yoast-seo-metabox-from-a-custom-post-type.php

function remove_yoast_meta_boxes( $post_type ) {
    $custom_post_type= 'movies'; // Replace this with your actual post type name.
	if ( $custom_post_type === $post_type ) {
		// remove Yoast SEO metaboxes if present.
		remove_meta_box( 'wpseo_meta', $post_type, 'normal' );
		remove_meta_box( 'yoast_internal_linking', $post_type, 'side' );
	}
}
add_action( 'add_meta_boxes', 'remove_yoast_meta_boxes', 90 );
// Remember to give priority a higher number. e.g. 90 or more bigger