Apply suggestions from code review

Co-authored-by: Adriane Boyd <adrianeboyd@gmail.com>

spacy/tests/conftest.py

@@ -1,4 +1,3 @@
-from pathlib import Path
 import pytest
 from spacy.util import get_lang_class
 from hypothesis import settings

spacy/tests/training/test_training.py

@@ -1130,7 +1130,7 @@ def test_training_before_update(doc):
     def generate_batch():
         yield 1, [Example(doc, doc)]
 
-    nlp = spacy.blank("en", config={"training": {}})
+    nlp = spacy.blank("en")
     nlp.add_pipe("tagger")
     optimizer = Adam()
     generator = train_while_improving(