Tips on Customizing Shortcodes for Amazon Affiliate

How to Hide Affiliate Shortcodes for Amazon Admin Menus

function plt_hide_affiliate_shortcodes_for_amazon_menus() {
	//Hide "AMZ Shortcodes".
	remove_menu_page('edit.php?post_type=amz_product');
	//Hide "AMZ Shortcodes → All Products".
	remove_submenu_page('edit.php?post_type=amz_product', 'edit.php?post_type=amz_product');
	//Hide "AMZ Shortcodes → Add Product".
	remove_submenu_page('edit.php?post_type=amz_product', 'post-new.php?post_type=amz_product');
	//Hide "AMZ Shortcodes → Shortcodes".
	remove_submenu_page('edit.php?post_type=amz_product', 'edit-tags.php?taxonomy=amazon_shortcode&post_type=amz_product');
	//Hide "AMZ Shortcodes → Settings".
	remove_submenu_page('edit.php?post_type=amz_product', 'amz_shortcodes_settings');
}

add_action('admin_menu', 'plt_hide_affiliate_shortcodes_for_amazon_menus', 11);

Where do I put this code?

How to Hide Affiliate Shortcodes for Amazon Meta Boxes

function plt_hide_affiliate_shortcodes_for_amazon_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Product Price" meta box.
	remove_meta_box('wpamz_box_price', $screen->id, 'advanced');
	//Hide the "Product Link" meta box.
	remove_meta_box('wpamz_box_affilink', $screen->id, 'advanced');
	//Hide the "Product image URL" meta box.
	remove_meta_box('wpamz_box_imgurl', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_affiliate_shortcodes_for_amazon_metaboxes', 20);