Remove Jetpack Related Posts on Custom Post Types

functions.php

<?php

//* Remove Jetpack Related Posts on THEMES CPT
function afn_jetpack_archive_no_related_posts( $options ) {
    if ( is_post_type_archive( 'themes' ) ) {
        $options['enabled'] = false;
    }
    return $options;
}
add_filter( 'jetpack_relatedposts_filter_options', 'afn_jetpack_archive_no_related_posts' );

//* Remove Jetpack Related Posts on THEMES Single Page
function afn_jetpack_singular_no_related_posts( $options ) {
    if ( is_singular( 'themes' ) ) {
        $options['enabled'] = false;
    }
    return $options;
}
add_filter( 'jetpack_relatedposts_filter_options', 'afn_jetpack_singular_no_related_posts' );