Hidden Character Showing on site in Safari

My site (https://eanad.com/) is showing a smiley face ?? on the bottom left side of the template when the site is viewed in Safari.

It seems to be coming from this, but I can’t find it in the template files to remove it:
};
var _loadGif = function(t, q, id) {
var i = new Image();
i.src = document.location.protocol + ‘//pixel.wp.com/’ + t + ‘?’ + q + ‘&rand=’ + Math.random();
i.alt = “:)”;
i.width = ‘6’;
i.height = ‘5’;
if (‘string’ === typeof id && document.body) {
i.id = id;
document.body.appendChild(i);
}

Could anyone tell me how to remove it?

Thanks!