[llvm-branch-commits] [clang] [Serialization] Code cleanups and polish 83233 (PR #83237)

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zeroomega wrote:

Change b5bd19211118c6d43bc525a4e3fb65d2c750d61e broke llvm's windows bots. See : https://lab.llvm.org/buildbot/#/builders/63/builds/2944 and this patch is the only commit in the blame list.

I reverted this patch in 12bdeba76eef1c7adf004a280036a7fb690ba573. Please reland the change after fixing the underlying issues.

https://github.com/llvm/llvm-project/pull/83237