fix: get rid of poll macro

[Anime-pdf]

I was working on personal project that included DPP and Asio, and DPP was defining poll that was clashing with asio's asio::details::scheduler::poll method, so I decided to remove it, I'm not sure how compat layers usually done in such project, so this is just my vision

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[braindigitalis]

looks good to me!

[Anime-pdf]

mb, forgor to include <poll.h> lol 💀