Обсуждение: pgsql: Remove leftover reference to old "flat file" mechanism in acomm

Remove leftover reference to old "flat file" mechanism in a comment.

The flat file mechanism was removed in PostgreSQL 9.0.

Branch
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REL9_5_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/f40fb143eddb4838c7309881ff929a65c28dd8d0

Modified Files
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src/backend/access/transam/xact.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)