Is the outermost layer always going to be one element? I would assume so if you're asking this question :p
I'd just loop through it and put it in a new array...
$array[0][0] = array(0 => "2004-06-02", 1 => 1.00);
$array[0][1] = array(0 => "blah", 1 => "blah2");
$new = array();
foreach($array as $a) {
$new = $a;
}
print_r($new);