remove unnecessary import and fix a potentially bug-causing typo

[yanfengliu]

Two changes:

• Removed import torchfile
• Fixed a potentially bug-causing typo. The line of code below is missing a ) before ==

type(region['segmentation']['counts'] == unicode or type(region['segmentation']['counts']) == str)

It is now:

type(region['segmentation']['counts']) == unicode or type(region['segmentation']['counts']) == str