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

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Author: pre-commit-ci[bot]

tests/transforms/test_generate_heatmapd.py

@@ -19,7 +19,7 @@
 
 from monai.data import MetaTensor
 from monai.transforms.post.dictionary import GenerateHeatmapd
-from tests.test_utils import TEST_NDARRAYS, assert_allclose
+from tests.test_utils import assert_allclose
 
 # Test cases for dictionary transforms with reference image
 # Only test with non-MetaTensor types to avoid affine conflicts