Remove unused/duplicated/non-applicable utils from pytorch/utils/helpers

[kylesayrs]

Purpose

• Remove utils, scoped to mostly src/llmcompressor/pytorch/utils/helpers.py
• Remove any utils which are related to fine tuning and therefore non-applicable
• Remove any utils which are duplicated by other utils files
• Keep any utils that may be worth using in the future

Changes

• Remove any unused/duplicated/non-applicable from pytorch/utils/helpers
• Keep any utils that may be worth using in the future
• Add pytest.mark.unit to helpers unit tests

Testing

• grep -r "from llmcompressor.pytorch.utils" src/ tests/ examples/
• Automated test coverage

[github-actions]

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[markurtz]

General note, I do worry with how much we are able to remove here and how much means we have restricted functionality, so would like to look through in more detail to designate what may be due to restricted functionality we'll need to add back in the future and what is fully migraged functionality either due to newer framework version or migration to compressed tensors

[kylesayrs]

@markurtz I've kept any utils functions that I saw as might having some use in the future. Even if we remove a function that is used in the future, it can be added back when it's needed.

[dbarbuzzi]

Add pytest.mark.unit to helpers unit tests

❤️

[brian-dellabetta]

another one