Tips on Customizing Oasis Workflow

How to Hide Oasis Workflow Admin Menus

function plt_hide_oasis_workflow_menus() {
	//Hide "Workflows".
	remove_menu_page('oasiswf-inbox');
	//Hide "Workflows → Inbox".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-inbox');
	//Hide "Workflows → Workflow History".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-history');
	//Hide "Workflows → Reports".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-reports');
	//Hide "Workflows → All Workflows".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-admin');
	//Hide "Workflows → Add New Workflow".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-add');
	//Hide "Workflows → Custom Statuses".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-custom-statuses');
	//Hide "Workflows → Tools".
	remove_submenu_page('oasiswf-inbox', 'oasiswf-tools');
	//Hide "Workflows → Settings".
	remove_submenu_page('oasiswf-inbox', 'ow-settings');
	//Hide "Workflows → Go Pro".
	remove_submenu_page('oasiswf-inbox', 'https://www.oasisworkflow.com/pricing-purchase');
}

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

Where do I put this code?

How to Hide the "Workflow Tasks At a Glance" Dashboard Widget

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

	//Remove the "Workflow Tasks At a Glance" widget.
	remove_meta_box('task_dashboard', 'dashboard', 'normal');
}

add_action('wp_dashboard_setup', 'plt_hide_oasis_workflow_dashboard_widgets', 20);