magento remove your credit card will be charged for
Open the file app/design/frontend/base/default/template/checkout/onepage/review/totals.phtml
You can see text here : your credit card will be charged for just or comment it out...
If you use onepagecheckout module then open the below file
\app\design\frontend\base\default\template\onepagecheckout\onepage\review\totals.phtml
Do the same in this file....