pgsql: Remove references to PostgreSQL bundled on Solaris

Remove references to PostgreSQL bundled on Solaris

Also remove special references to downloads off pgfoundry since they are
not correct - downloads are done through the main website.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/d80785e6ed872acfc4ec156e540e16db878a81d3

Modified Files
--------------
doc/src/sgml/installation.sgml | 9 ---------
1 files changed, 0 insertions(+), 9 deletions(-)