pgsql-server: Remove no-longer-relevant information about trying to

Log Message:
-----------
Remove no-longer-relevant information about trying to force your OS
to support PST8PDT time zone for the regression tests.

Modified Files:
--------------
pgsql-server/doc/src/sgml:
regress.sgml (r1.40 -> r1.41)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/src/sgml/regress.sgml.diff?r1=1.40&r2=1.41)