You could write a function to exclude the attributes you don't need. Something like this:
iTemplate = new InfoTemplate("County",getTemplate)
function getTemplate(graphic) {
var content = "";
for (var att in graphic.attributes) {
if (att != "ObjectID" && att != "STATE_FIPS")
content += att + "=" + graphic.attributes[att] + "</br>";
}
return content;
}