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