Unfortunately, it's inconclusive which exactly it is and depends on the browser, but this code should hide that from any date picker fields.

$('.hasDatePicker').attr('autocomplete', false);

It may also work with this code.

$('.hasDatePicker').prop('autofill', false);

These would be added to your javascript code anywhere you like. If you don't have any code in you'll want to make sure you add in the next part as well

$(document).ready(function(){

//Add your code here.

})

Hopefully one of those two examples above should hide it. I had the same problem before and this fixed it.

Be warned that browsers (especially Chrome) will switch between these sometimes and even break them completely. It's a known issue in the JavaScript world but hasn't seemed to be addressed or standardized yet. Let me know if neither one works.

Good luck!