[REFACTOR][CUDA] Phase out l2 cache flush preproc test#19768
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The CUDA-specific timer preprocessor test was the only user of the nvbench-derived L2 cache flush helper. Removing that path avoids carrying a special CUDA registration and third-party header for benchmark-only test coverage.
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This pull request removes the NVBench-based L2 cache flushing functionality (l2_cache_flush_cuda), including its header, implementation, associated license entry, and tests. As there are no review comments, I have no feedback to provide.
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tlopex
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Jun 14, 2026
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The CUDA-specific timer preprocessor test was the only user of the nvbench-derived L2 cache flush helper. Removing that path avoids carrying a special CUDA registration and third-party header for benchmark-only test coverage.
This PR removes the CUDA L2 cache flush registration, the dedicated preprocessor timing test, and the now-unused nvbench-derived license/dependency entry.