The doc nicely explains why the directory exists and it is irrelevant when it was introduced. Even if it was relevant, it could be trivially found out via `git log ./src/node/ | tail` without visiting GitHub
This concludes backport of core#21575 [6/6]
https://github.com/bitcoin/bitcoin/pull/21575/commits/fadcd3f78e1dd1acd7a774f8fad68dc471ff9e1f