Can you please let me know how I can remove the hAxis in the charts? Here is the script that I am trying to get to work. The current data is datetime and is too long to visualize on a small line chart. Thanks in advance!

<script type="text/javascript">
jQuery(window).load(function(){
    if( typeof wpDataChartsCallbacks == 'undefined' ){ wpDataChartsCallbacks = {}; }
    wpDataChartsCallbacks[7] = function(obj){
        obj.options.hAxis.textPosition = 'none'; }
});
</script>