<apex:component access="global">
<style>
 div.hideCurrDate span.dateInput span.dateFormat{
 display:none;
 }
</style>
<div class="hideCurrDate">
<apex:componentBody />
</div>
</apex:component>

 link from: http://developer.force.com/cookbook/recipe/hide-the-current-date-link-on-an-inputfield