Deprecate vector/unordered_map again (#22478)
Summary:
The deprecation was temporarily removed in https://github.com/pytorch/pytorch/pull/21999 because it threw warnings on our codebase.
https://github.com/pytorch/pytorch/pull/22162 fixed these internal call sites so we can now re-enable the deprecation.
I checked locally that this PR doesn't add any new warnings.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22478
Differential Revision: D16101342
Pulled By: smessmer
fbshipit-source-id: 378eb208f6a3dd3a28d2efe2e001fd71a9569297
