remove debug log

lib/skins.js

@@ -123,7 +123,6 @@ exp.open_skin = function(rid, skinpath, callback) {
 // write the image +buffer+ to the +outpath+ file
 // callback: error
 exp.save_image = function(buffer, outpath, callback) {
-  logging.error("outpath:" + outpath);
   lwip.open(buffer, "png", function(err, image) {
     if (err) {
       callback(err);