How to Hide WorkflowDone Geo Blocker Admin Menus

function plt_hide_workflowdone_geo_blocker_menus() {
	//Hide "Geo Blocker".
	remove_menu_page('workflowdone-geo-blocker');
	//Hide "Geo Blocker → Settings".
	remove_submenu_page('workflowdone-geo-blocker', 'workflowdone-geo-blocker');
	//Hide "Geo Blocker → Tools".
	remove_submenu_page('workflowdone-geo-blocker', 'wfgb-tools');
	//Hide "Geo Blocker → ⭐ Supporter Features".
	remove_submenu_page('workflowdone-geo-blocker', 'wfgb-supporter-features');
	//Hide "Geo Blocker → ☕ Become a Supporter".
	remove_submenu_page('workflowdone-geo-blocker', 'wfgb-supporter');
}

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

Where do I put this code?