How to Hide the "Jika Widgets" Admin Menu

function plt_hide_jika_stock_market_widgets_menus() {
	//Hide the "Jika Widgets" menu.
	remove_menu_page('jika-widgets-settings-overview');
}

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

Where do I put this code?