How to Hide Code Snippets Admin Menus

function plt_hide_code_snippets_menus() {
	//Hide "Snippets".
	remove_menu_page('snippets');
	//Hide "Snippets → All Snippets".
	remove_submenu_page('snippets', 'snippets');
	//Hide "Snippets → Add New".
	remove_submenu_page('snippets', 'add-snippet');
	//Hide "Snippets → Import".
	remove_submenu_page('snippets', 'import-code-snippets');
	//Hide "Snippets → Settings".
	remove_submenu_page('snippets', 'snippets-settings');
	//Hide "Snippets → Go Pro".
	remove_submenu_page('snippets', 'code_snippets_upgrade');
}

add_action('admin_menu', 'plt_hide_code_snippets_menus', 501);
Where do I put this code?