Olá,
Edite o arquivo catalog/view/theme/grey-orange/template/common/
header.tpl e localize e remova as linhas abaixo:
Código: Selecionar todos<?php
$sys=base64_decode('PGRpdiBpZD0iYXV0b3IiPg0KCTxwPkRlc2lnbjogPGJyLz48YSBocmVmPSJodHRwOi8vd3d3LmRzd3d3LnBsLyIgdGl0bGU9IlR3b3J6ZW5pZSBzdHJvbiBpbnRlcm5ldG93eWNoIj5Ud29yemVuaWUgc3Ryb24gaW50ZXJuZXRvd3ljaDwvYT48L3A+DQogICAgICAgIDxwPjxhIGhyZWY9Imh0dHA6Ly93d3cudHNpLmluZm8ucGwiIHRpdGxlPSJUd29yemVuaWUgc3Ryb24gaW50ZXJuZXRvd3ljaCI+VHdvcnplbmllIHN0cm9uIGludGVybmV0b3d5Y2g8L2E+PC9wPg0KPC9kaXY+');
?>
E salve as alterações no arquivo.
Espero ter ajudado.
Sempre em frente...