Prevent Product Dropdown on Sensei Course Page

sensei-wc-course-snippet.php

<?php
add_action( 'add_meta_boxes', function() {
  remove_meta_box( 'course-wc-product', 'course', 'side' );
  add_meta_box( 'course-wc-product', __( 'WooCommerce Product', 'woothemes-sensei' ), function() {
	if ( ! function_exists( 'Sensei' ) ) { return; }
	global $post;
    $select_course_woocommerce_product = get_post_meta( $post->ID, '_course_woocommerce_product', true );

  	echo '<input type="hidden" name="' . esc_attr( 'woo_course_noonce' ) . '" id="' . esc_attr( 'woo_course_noonce' ) . '" value="' . esc_attr( wp_create_nonce( plugin_basename( Sensei()->plugin_path ) ) ) . '" />';
	echo '<label for="wc-course-product-id">Product ID</label><br />';
	echo '<input type="text" id="wc-course-product-id" value="' . esc_attr( absint( $select_course_woocommerce_product ) ) . '" name="course_woocommerce_product" />';
  }, 'course', 'side', 'default' );
}, 21 );