[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

tests/transforms/test_rand_simulate_low_resolution.py

@@ -18,7 +18,7 @@
 import torch
 from parameterized import parameterized
 
-from monai.data.meta_obj import get_track_meta, set_track_meta
+from monai.data.meta_obj import get_track_meta
 from monai.transforms import RandSimulateLowResolution
 from tests.test_utils import TEST_NDARRAYS, assert_allclose