[clean] remove unused function

id06workflow/core/Dataset/__init__.py

@@ -104,10 +104,6 @@ class Dataset(object):
         self._ff_files.append(flat_field_file)
         self.__ff_has_changed = True
 
-    def applyShiftCorrection(self, correction):
-        # TODO: move shift corrcetion code in here
-        raise NotImplementedError('')
-
     def is_valid(self):
         return len(self._data_files_pattern) > 0 or self._data is not None