pgsql: Remove misleading hints about reducing the System V request size

Remove misleading hints about reducing the System V request size.

Since the request size will now be ~48 bytes regardless of how
shared_buffers et. al. are set, much of this advice is no longer
relevant.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/6a77bff086b9bba94ab6cd6229a74f44d3ec266d

Modified Files
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src/backend/port/sysv_shmem.c |   32 +++++++++-----------------------
1 files changed, 9 insertions(+), 23 deletions(-)