Remove rejected promise of PiexLoader which is not caught.

ui/file_manager/image_loader/request.js

Index: ui/file_manager/image_loader/request.js
diff --git a/ui/file_manager/image_loader/request.js b/ui/file_manager/image_loader/request.js
index 0f55e1a65838ad7edaebdbfb7f04bbd9d980bd15..af197cbc4abb2cba136be10fbd0742df9031ec08 100644
--- a/ui/file_manager/image_loader/request.js
+++ b/ui/file_manager/image_loader/request.js
@@ -261,8 +261,8 @@ ImageRequest.prototype.downloadOriginal_ = function(onSuccess, onFailure) {
       this.image_.src = url;
       this.request_.orientation = data.orientation;
       this.request_.colorSpace = data.colorSpace;
-    }.bind(this), function(error) {
-      console.error('PiexLoaderError: ', error);
+    }.bind(this), function() {
+      // The error has already been logged in PiexLoader.
       onFailure();
     });
     return;