Remove unnecessary SD reload from saved dir

[l-bat]

What does this PR do?

I only deleted one line where int8_pipe was reloaded from the saved directory. I believe we can compare the latency of the initial int8_pipe optimized via OVQuantizer.

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• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[l-bat]

@AlexKoff88, please take a look. It was added in #770

[HuggingFaceDocBuilderDev]

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