How to Hide Order Tracking - WordPress Status Tracking Plugin Admin Menus

function plt_hide_order_tracking_menus() {
	//Hide "Tracking".
	remove_menu_page('ewd-otp-orders');
	//Hide "Tracking → Dashboard".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-dashboard');
	//Hide "Tracking → Orders".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-orders');
	//Hide "Tracking → Sales Reps".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-sales-reps');
	//Hide "Tracking → Export".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-export');
	//Hide "Tracking → Import".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-import');
	//Hide "Tracking → About Us".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-about-us');
	//Hide "Tracking → Customers".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-customers');
	//Hide "Tracking → Custom Fields".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-custom-fields');
	//Hide "Tracking → Settings".
	remove_submenu_page('ewd-otp-orders', 'ewd-otp-settings');
}

add_action('admin_menu', 'plt_hide_order_tracking_menus', 100);
Where do I put this code?