diff --git a/haystack/reader/farm.py b/haystack/reader/farm.py
index 008f1acf93..e22579a07f 100644
--- a/haystack/reader/farm.py
+++ b/haystack/reader/farm.py
@@ -5,7 +5,6 @@
 from collections import defaultdict
 from time import perf_counter
 
-import numpy as np
 from farm.data_handler.data_silo import DataSilo
 from farm.data_handler.processor import SquadProcessor
 from farm.data_handler.dataloader import NamedDataLoader
@@ -17,7 +16,6 @@
 from farm.train import Trainer
 from farm.eval import Evaluator
 from farm.utils import set_all_seeds, initialize_device_settings
-from scipy.special import expit
 
 from haystack import Document
 from haystack.document_store.base import BaseDocumentStore
@@ -624,10 +622,6 @@ def calibrate_confidence_scores(
                   label_origin=label_origin,
                   calibrate_conf_scores=True)
 
-    @staticmethod
-    def _get_pseudo_prob(score: float):
-        return float(expit(np.asarray(score) / 8))
-
     @staticmethod
     def _check_no_answer(c: QACandidate):
         # check for correct value in "answer"