pgsql: Remove configure detection of crypt()

Remove configure detection of crypt()

crypt() hasn't been needed since crypt detection was removed from
PostgreSQL, so these configure checks are not necessary.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/21f88934-f00c-27f6-a9d8-7ea06d317781%402ndquadrant.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/c45643d618e35ec2fe91438df15abd4f3c0d85ca

Modified Files
--------------
configure                     |   71 +--
configure.in                  |    3 -
src/backend/libpq/crypt.c     |    3 -
src/include/pg_config.h.in    |    6 -
src/include/pg_config.h.win32 |    6 -
src/include/port.h            |    3 -
src/port/crypt.c              | 1067 -----------------------------------------
src/tools/msvc/Mkvcbuild.pm   |    2 +-
8 files changed, 2 insertions(+), 1159 deletions(-)