Peter Eisentraut ae0e1be9f2 Allow redeclaration of typedef yyscan_t
This is allowed in C11, so we don't need the workaround guards against
it anymore.  This effectively reverts commit 382092a0cd2 that put
these guards in place.

Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/10d32190-f31b-40a5-b177-11db55597355@eisentraut.org
2025-09-12 08:16:00 +02:00
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