make precommit happy

Author: idalr

dataset_builders/pie/aae2/README.md

@@ -214,8 +214,6 @@ python src/evaluate_documents.py dataset=aae2_base metric=relation_argument_toke
 
 ![rtd-label_aae2_test.png](img%2Frtd-label_aae2_test.png)
 
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 </details>
 
 #### Span lengths (tokens)