Drop plots as they might cause tkinter crashes

The following exception has already occured a couple of times:
Exception ignored in: <function Image.__del__ at 0x7fe33a287dc0>
Traceback (most recent call last):
  File "/home/corp.cyren.com/jclement/.pyenv/versions/3.8.7/lib/python3.8/tkinter/__init__.py",
  line 4020, in __del__
RuntimeError: main thread is not in main loop

Searching for a cause of this error led me to this result:
r9y9/deepvoice3_pytorch#5
It suggest that matplotlib might be causing this. Therefore the plotting
of the scores is removed from this script. It can still easily be done
with the visualize-results scripts.

src/thesis/classify.py

@@ -48,7 +48,6 @@
 from .metrics import avg_file_scores, file_scores, top_k_accuracy_score
 from .models import is_model_finger, ModelHandler
 from .prepared_data import adapt_durations, extract_features, MeasurementNormalizer
-from .visualize_results import plot_scores
 
 SEED: Final = 23
 random.seed(SEED)
@@ -455,12 +454,6 @@ def _finish(self):
             ].mean(axis=1)
         )
         self.finished = True
-        description = (
-            f"cv: {len(self.cv_splits)}"
-            f", n: {len(self.y)}"
-            f", n_defects: {len(self.defects)}"
-        )
-        plot_scores(self.scores, self.config, self.output_dir, description=description)
 
 
 @click.command()

tests/test_classify.py

@@ -22,9 +22,6 @@ def test_classify_main(config, tmpdir):
     result = runner.invoke(classify.main, [str(config_filepath)])
 
     assert result.exit_code == 0
-    assert Path(config["general"]["output_dir"], "val_balanced_accuracy.svg").exists()
-    assert Path(config["general"]["output_dir"], "val_accuracy.svg").exists()
-    assert Path(config["general"]["output_dir"], "val_top_3_accuracy.svg").exists()
 
 
 def test_classify_ClassificationHandler_with_saving(