How to Hide GetPaid Admin Menus

function plt_hide_invoicing_menus() {
	//Hide "Tools → Anonymization Logs".
	remove_submenu_page('tools.php', 'wpinv-anonymization-logs');

	//Hide "GetPaid".
	remove_menu_page('wpinv');
	//Hide "GetPaid → Items".
	remove_submenu_page('wpinv', 'edit.php?post_type=wpi_item');
	//Hide "GetPaid → Payment Forms".
	remove_submenu_page('wpinv', 'edit.php?post_type=wpi_payment_form');
	//Hide "GetPaid → Invoices".
	remove_submenu_page('wpinv', 'edit.php?post_type=wpi_invoice');
	//Hide "GetPaid → Discounts".
	remove_submenu_page('wpinv', 'edit.php?post_type=wpi_discount');
	//Hide "GetPaid → Customers".
	remove_submenu_page('wpinv', 'wpinv-customers');
	//Hide "GetPaid → Reports".
	remove_submenu_page('wpinv', 'wpinv-reports');
	//Hide "GetPaid → Subscriptions".
	remove_submenu_page('wpinv', 'wpinv-subscriptions');
	//Hide "GetPaid → Settings".
	remove_submenu_page('wpinv', 'wpinv-settings');
	//Hide "GetPaid → Extensions".
	remove_submenu_page('wpinv', 'wpi-addons');

	//Hide "Settings → Font Awesome".
	remove_submenu_page('options-general.php', 'wp-font-awesome-settings');
	//Hide "Settings → AyeCode UI".
	remove_submenu_page('options-general.php', 'ayecode-ui-settings');
}

add_action('admin_menu', 'plt_hide_invoicing_menus', 101);
Where do I put this code?