Revert "Install bitsandbytes for ROCm"

[petrex]

Reverts #1915

[pytorch-bot]

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✅ You can merge normally! (7 Unrelated Failures)

As of commit 7d93214 with merge base 9af2a45 ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Run Regression Tests on ROCm / test-nightly (ROCM Nightly, linux.rocm.gpu.mi300.2, --pre torch --index-url https://download.pyto... / linux-job (gh) (similar failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2

BROKEN TRUNK - The following jobs failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Run Regression Tests / test (CPU 2.4, linux.4xlarge, torch==2.4.0 --index-url https://download.pytorch.org/whl/cpu, cpu) / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test (CPU 2.5.1, linux.4xlarge, torch==2.5.1 --index-url https://download.pytorch.org/whl/cpu, cpu) / linux-job (gh) (trunk failure)
• Run Regression Tests / test (CUDA 2.4, linux.g5.12xlarge.nvidia.gpu, torch==2.4.0, cuda, 12.1) / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test (CUDA 2.5.1, linux.g5.12xlarge.nvidia.gpu, torch==2.5.1 --index-url https://download.pytorch... / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test-nightly (CPU Nightly, linux.4xlarge, --pre torch --index-url https://download.pytorch.org/wh... / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2
• Run Regression Tests / test-nightly (CUDA Nightly, linux.g5.12xlarge.nvidia.gpu, --pre torch --index-url https://downloa... / linux-job (gh) (trunk failure)
  test/quantization/test_qat.py::TestQAT::test_qat_8da4w_prepare_vs_convert_2

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[petrex]

TestQAT.test_qat_8da4w_prepare_vs_convert_* failing in CI. --> irrelevant.