How to Hide MeetingHub Admin Menus

function plt_hide_meetinghub_menus() {
	//Hide "MeetingHub".
	remove_menu_page('meetinghub');
	//Hide "MeetingHub → All Meetings".
	remove_submenu_page('meetinghub', 'meetinghub');
	//Hide "MeetingHub → Settings".
	remove_submenu_page('meetinghub', 'meetinghub-settings');
	//Hide "MeetingHub → Add-ons".
	remove_submenu_page('meetinghub', 'meetinghub-addons');
	//Hide "MeetingHub → Integrations".
	remove_submenu_page('meetinghub', 'meetinghub-integrations');
	//Hide "MeetingHub → Get In Touch".
	remove_submenu_page('meetinghub', 'get-in-touch');
	//Hide "MeetingHub → Upgrade".
	remove_submenu_page('meetinghub', 'meetinghub-pricing');
}

add_action('admin_menu', 'plt_hide_meetinghub_menus', 1000000000);

Where do I put this code?