Remove pinning protobuf version since 3.20.3 is old and not supported by Tensorflow#830
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copybara-service[bot] wants to merge 1 commit intomasterfrom
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Remove pinning protobuf version since 3.20.3 is old and not supported by Tensorflow#830copybara-service[bot] wants to merge 1 commit intomasterfrom
copybara-service[bot] wants to merge 1 commit intomasterfrom
