Fix tests

sziszapangma/integration/mapper/word_mapper.py

 from typing import Dict
 
-from sziszapangma.core.alignment.alignment_step import AlignmentStep
-from sziszapangma.core.alignment.step_words import StepWords
 from sziszapangma.core.alignment.word import Word
 
 _ID = 'id'

sziszapangma/integration/task/classic_wer_metric_task.py

@@ -3,7 +3,6 @@ from typing import List, Dict
 from sziszapangma.core.alignment.alignment_classic_calculator import \
     AlignmentClassicCalculator
 from sziszapangma.core.alignment.alignment_step import AlignmentStep
-from sziszapangma.core.alignment.word import Word
 from sziszapangma.core.wer.wer_calculator import WerCalculator
 from sziszapangma.integration.mapper.alignment_step_mapper import \
     AlignmentStepMapper