How to Hide Data Tables Generator by Supsystic Admin Menus

function plt_hide_data_tables_generator_by_supsystic_menus() {
	//Hide "Data Tables by Supsystic".
	remove_menu_page('supsystic-tables');
	//Hide "Data Tables by Supsystic → Data Tables by Supsystic".
	remove_submenu_page('supsystic-tables', 'supsystic-tables');
	//Hide "Data Tables by Supsystic → Overview".
	remove_submenu_page('supsystic-tables', 'supsystic-tables&module=overview');
	//Hide "Data Tables by Supsystic → Add table".
	remove_submenu_page('supsystic-tables', 'supsystic-tables#add');
	//Hide "Data Tables by Supsystic → Tables".
	remove_submenu_page('supsystic-tables', 'supsystic-tables&module=tables');
	//Hide "Data Tables by Supsystic → Settings".
	remove_submenu_page('supsystic-tables', 'supsystic-tables&module=settings');
}

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

Where do I put this code?