ruff check

Author: gtca

tests/test_merge.py

@@ -1,4 +1,3 @@
-import unittest
 
 import numpy as np
 import pytest
@@ -7,7 +6,6 @@
 import mudata
 from mudata import MuData
 
-
 N, D1, D2 = 100, 20, 30
 N1 = 15
 N2 = N - N1