How to Hide the "Web3 Token Gate" Admin Menu

function plt_hide_web3_token_gate_menus() {
	//Hide the "Web3 Token Gate" menu.
	remove_menu_page('web3-token-gate');
}

add_action('admin_menu', 'plt_hide_web3_token_gate_menus', 1000000000);

Where do I put this code?