Referring to the kind of chart shown here: http://code.google.com/apis/visualization/documentation/gallery/barchart.html
There doesn't seem to be a simple switch, and changing the axis color to white (on a white background) didn't seem to do anything. I even tried jquery to hide the selectors produced by the api output but no dice.
You can set hAxis.textPosition
to the value of 'none
'
For example:
var options = {
hAxis: { textPosition: 'none' },
};
chart.draw(data, options);
See https://developers.google.com/chart/interactive/docs/gallery/barchart#Configuration_Options