Tips on Customizing JTRT Responsive Tables

How to Hide JTRT Responsive Tables Admin Menus

function plt_hide_jtrt_responsive_tables_menus() {
	//Hide the "JTRT Table" menu.
	remove_menu_page('edit.php?post_type=jtrt_tables_post');
	//Hide the "JTRT Table → All Tables" menu.
	remove_submenu_page('edit.php?post_type=jtrt_tables_post', 'edit.php?post_type=jtrt_tables_post');
	//Hide the "JTRT Table → Add New" menu.
	remove_submenu_page('edit.php?post_type=jtrt_tables_post', 'post-new.php?post_type=jtrt_tables_post');
}

add_action('admin_menu', 'plt_hide_jtrt_responsive_tables_menus', 15);

Where do I put this code?

How to Hide the "JTRT Table Creator" Meta Box

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

	//Hide the "JTRT Table Creator" meta box.
	remove_meta_box('jtrt_tables_post', $screen->id, 'advanced');
}

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