Remove backwards compatibility for the submission checker. Update sub…

[arjunsuresh]

…mission_checker.py

It makes sense to remove the backwards compatibility of the submission checker in the master branch. We can always use a specific release of the inference repository to get the submission checker for that round of submission.

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[nvzhihanj]

Thanks Arjun, I think we are okay with the change as long as it doesn't break the behavior of 4.0 and 4.1 existing benchmarks. Have you tested the workloads?

[arjunsuresh]

Thank you @nvzhihanj for reviewing. Yes, it is tested for 4.0 submission repo by the github action.

[nv-ananjappa]

@mrmhodak NVIDIA members experienced with submission checker also agreed that we can drop the backwards compatibility and thus simplify the submission checker a lot. Arjun's PR is a good idea and we approve.