Fix/remove-numel - Remove numel is zero check from context manager exit method

[costigt-dev]

Reason for this PR

torch.empty and torch.numel don't work as originally expected although this code path was unlikely to be triggered in the original scenario this context manager was added to resolve

Changes Made in this PR

Removed the contents of the exit method in the load_quant_model context manager as the method to detect if the newly added biases were corrected won't work as intended.

Also replaced empty with zeros so the bias layer won't affect anything if unused.

Testing Summary

Risk Highlight

• This PR includes code from another work (please detail).
• This PR contains API-breaking changes.
• This PR depends on work in another PR (please provide links/details).
• This PR introduces new dependencies (please detail).
• There are coverage gaps not covered by tests.
• Documentation updates required in subsequent PR.

Checklist

• Code comments added to any hard-to-understand areas, if applicable.
• Changes generate no new warnings.
• Updated any relevant tests, if applicable.
• No conflicts with destination dev branch.
• I reviewed my own code changes.
• Initial CI/CD passing.
• 1+ reviews given, and any review issues addressed and approved.
• Post-review full CI/CD passing.

Future Work

[Giuseppe5]

We would still have an issue if the state dict the user is trying to load has no bias for certain modules, correct?

[costigt-dev]

We would still have an issue if the state dict the user is trying to load has no bias for certain modules, correct?

yes, i'm not sure of the best way to handle that

[Giuseppe5]

New change modifies the load state dict function withing a QuantWBIOL layer.