I've done it with one line of code, but it should be an option in the admin at the very least, but that is up to the mind of the ubercart owner.

Beta 2:
In ubercart\uc_store\uc_store.module in function uc_store_footer located at about line 500 :
at the end of the function, find the line:
return theme('uc_store_footer', $message);

and add this line before:
$message = "";

so that it now looks like:
$message = "";
return theme('uc_store_footer', $message);

This is certainly not a nice way to go about it, but it works fine and you only have to remember to change it again whenever you update your version of ubercart and for as long as the owner doesn't provide an easy admin option.

Or you could do it the theme way, I don't know how, but for this you need someone else to give you the code for it, in that case you wouldn't have to hack in the module directly, just in your template file.