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

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Author: pre-commit-ci[bot]

src/lightning/fabric/utilities/testing/_runif.py

@@ -17,7 +17,7 @@
 from typing import Optional
 
 import torch
-from lightning_utilities.core.imports import RequirementCache, compare_version
+from lightning_utilities.core.imports import compare_version
 from packaging.version import Version
 
 from lightning.fabric.accelerators import XLAAccelerator