Remove support for ExtractedText for bag metrics.

qurator/dinglehopper/metrics/bag_of_words_accuracy.py

@@ -1,20 +1,12 @@
 from collections import Counter
-from typing import Union
 
 from .utils import bag_accuracy, MetricResult, Weights
-from .. import ExtractedText
 from ..normalize import words_normalized
 
 
 def bag_of_words_accuracy(
-    reference: Union[str, ExtractedText],
-    compared: Union[str, ExtractedText],
-    weights: Weights,
+    reference: str, compared: str, weights: Weights
 ) -> MetricResult:
-    if isinstance(reference, ExtractedText):
-        reference = reference.text
-    if isinstance(compared, ExtractedText):
-        compared = compared.text
     reference_words = Counter(words_normalized(reference))
     compared_words = Counter(words_normalized(compared))
     result = bag_accuracy(reference_words, compared_words, weights)

qurator/dinglehopper/tests/metrics/test_bag_accuracy.py

@@ -1,4 +1,3 @@
-import math
 import unicodedata
 from collections import Counter