Fix invalid reference to item field and remove unused variables

[Ingramz]

No description provided.

[winstliu]

No description provided.

What does this fix? How does one encounter this? Are there any open issues pertaining to this? etc.

[Ingramz]

It's a mistake or unintended feature that coffeescript allowed in older versions. Newer versions of coffeescript transpile the item parameter as item1 to avoid naming conflict with the line that was changed. If you use an older version of coffeescript, it fixes nothing, in newer versions the code would fail.

http://coffeescript.org/#1.9.0

Changed strategy for the generation of internal compiler variable names.

[Ingramz]

Also removed some unused variables that were found with coffeescope. I verified that the "invalid" reference was the only one.

[winstliu]

Thanks!