How to Hide Get Cash Admin Menus

function plt_hide_get_cash_menus() {
	//Hide "Get Cash".
	remove_menu_page('get-cash');
	//Hide "Get Cash → Get Cash".
	remove_submenu_page('get-cash', 'get-cash');
	//Hide "Get Cash → Transactions NEW".
	remove_submenu_page('get-cash', 'http://127.0.0.1/wp-admin/edit.php?post_type=gc-transactions');
	//Hide "Get Cash → Review".
	remove_submenu_page('get-cash', 'https://wordpress.org/support/plugin/get-cash/reviews/?filter=5');
	//Hide "Get Cash → Free Recommended Plugins".
	remove_submenu_page('get-cash', 'http://127.0.0.1/wp-admin/plugin-install.php?s=theafricanboss&tab=search&type=author');
	//Hide "Get Cash → Premium recommended plugins".
	remove_submenu_page('get-cash', 'get_cash_recommended_menu_page');
	//Hide "Get Cash → FAQ".
	remove_submenu_page('get-cash', 'get_cash_help_menu_page');
	//Hide "Get Cash → Contact Us".
	remove_submenu_page('get-cash', 'get-cash-contact');
	//Hide "Get Cash → Upgrade".
	remove_submenu_page('get-cash', 'get-cash-pricing');

	//Hide "GC transactions".
	remove_menu_page('edit.php?post_type=gc-transactions');
	//Hide "GC transactions → GC transactions".
	remove_submenu_page('edit.php?post_type=gc-transactions', 'edit.php?post_type=gc-transactions');
	//Hide "GC transactions → Add Post".
	remove_submenu_page('edit.php?post_type=gc-transactions', 'post-new.php?post_type=gc-transactions');
}

add_action('admin_menu', 'plt_hide_get_cash_menus', 1000000000);
Where do I put this code?