pgsql: Remove incorrect field from information schema

Remove incorrect field from information schema

The source code comment already said that the presence of the field
element_types.domain_default might be a bug in the standard, since it
never made sense there.  Indeed, the field is gone in newer versions
of the standard.  So just remove it.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/78806a95095c4fb9230a441925244690d9c07d23

Modified Files
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doc/src/sgml/information_schema.sgml       | 9 ---------
src/backend/catalog/information_schema.sql | 2 --
src/include/catalog/catversion.h           | 2 +-
3 files changed, 1 insertion(+), 12 deletions(-)