[Forwardport]Delete all unused imports of lib/internal/Magento

[VitaliyBoyko]

Description

Deleted Manually all imports not used inside lib/internal/Magento that not needed
Original PR: #16946

PS. Some imports are already fixed so this PR contain fewer changes then the original one.

[magento-cicd2]

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[magento-engcom-team]

Hi @VitaliyBoyko. Thank you for your contribution
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