C++: Remove unnecessary `FlowState` from `cpp/overrun-write`#14486

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MathiasVP merged 1 commit intogithub:mainfrom

MathiasVP:simplify-overrun-write

Oct 12, 2023

Commits on Oct 12, 2023

C++: Remove the hacky flow state since this is no longer needed after #13717.
MathiasVP
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