Remove comment

lib/cartodb/models/dataview/overviews/formula.js

@@ -55,7 +55,6 @@ function zoom_level_for_bbox(bbox) {
     // should use extended overviews metadata to compute this properly.
     if ( bbox ) {
       var bbox_values = _.map(bbox.split(','), function(v) { return +v; });
-      // TODO: look at possible crossing-180º issues
       var w = Math.abs(bbox_values[2]-bbox_values[0]);
       var h = Math.abs(bbox_values[3]-bbox_values[1]);
       var max_dim = Math.min(w, h);