How to Hide Webinar and Video Conference with Jitsi Meet Admin Menus

function plt_hide_webinar_and_video_conference_with_jitsi_meet_menus() {
	//Hide "Jitsi Meet".
	remove_menu_page('jitsi-meet');
	//Hide "Jitsi Meet → Documentation".
	remove_submenu_page('jitsi-meet', 'jitsi-meet');
	//Hide "Jitsi Meet → Settings".
	remove_submenu_page('jitsi-meet', 'jitsi-pro-settings');
	//Hide "Jitsi Meet → Add-ons 								 New".
	remove_submenu_page('jitsi-meet', 'jitsi-pro-add-ons');
	//Hide "Jitsi Meet → Upgrade to Pro".
	remove_submenu_page('jitsi-meet', 'https://go.wppool.dev/qc5');
}

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

Where do I put this code?