Uninstalling Nokia Flasher Harmattan
The package available for download at MacFlasher_3.12.1.dmg contains the following files which you can remove manually. You can also remove the package receipt from /var/db/receipts/.

                                                  

To find this list of files from the package, I extracted the package to a custom location using the following, then inspected the contents of the temporary directory.

pkgutil --expand /path/to/nokia_flasher.pkg /path/to/temporary


For an automated solution, try using UninstallPKG. This will parse the package receipt and allow you to remove the files.