pgsql: Remove references to pgfoundry as recommended hosting platform

Remove references to pgfoundry as recommended hosting platform

pgfoundry is deprectaed and no longer accepting new projects,
so we really shouldn't be directing people there.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/51fc406819a06799e77ecfa751557318e16e4677

Modified Files
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doc/src/sgml/external-projects.sgml | 13 -------------
1 files changed, 0 insertions(+), 13 deletions(-)