Remover cupom e estimativa de frete no checkout.
editar arquivo /app/design/frontend/base/default/layout/checkout.xml
remover cupom
<block type="checkout/cart_coupon" name="checkout.cart.coupon" as="coupon" template="checkout/cart/coupon.phtml"/>
remover frete
<block type="checkout/cart_shipping" name="checkout.cart.shipping" as="shipping" template="checkout/cart/shipping.phtml"/>
atualizar cache.
editar arquivo /app/design/frontend/base/default/layout/checkout.xml
remover cupom
<block type="checkout/cart_coupon" name="checkout.cart.coupon" as="coupon" template="checkout/cart/coupon.phtml"/>
remover frete
<block type="checkout/cart_shipping" name="checkout.cart.shipping" as="shipping" template="checkout/cart/shipping.phtml"/>
atualizar cache.