remove orig_params check

[milocress]

What does this PR do?

Allows load_fsdp_monolith_rank0_only and use_orig_params to both be set to True - this was initially disabled due to a pytorch issue I think, but has since been resolved.

What issue(s) does this change relate to?

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[mvpatel2000]

In my entire career this is one of the best prs ive seen