How to remove/change JQuery UI Autocomplete Helper text?

It seems that this is a new feature in JQuery UI 1.9.0, because I used JQuery UI plenty of times before and this text never poped up.

Couldn't find anything related on the API documentation.

So using an basic autocomplete example with local source

$( "#find-subj" ).autocomplete({
    source: availableTags
});

When the search matches it shows this related helper text:

'1 result is available, use up and down arrow keys to navigate.'

How can I disable it in a nice way, not by removing it with JQuery selectors.

I know this has been asnwered but just wanted to give an implementation example:

var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++"
    ];

$("#find-subj").autocomplete({
    source: availableTags,
    messages: {
        noResults: 'no results',
        results: function(amount) {
            return amount + 'results.'
        }
    }
});

This is used for accessibility, an easy way to hide it is with CSS:

.ui-helper-hidden-accessible { display:none; }

Or (see Daniel's comment bellow)

.ui-helper-hidden-accessible { position: absolute; left:-999em; }