pgsql: Remove -i/--ignore-version option from pg_dump, pg_dumpall and p

Remove -i/--ignore-version option from pg_dump, pg_dumpall and pg_restore.

The commit c22ed3d523782c43836c163c16fa5a7bb3912826 turned
the -i/--ignore-version options into no-ops and marked as deprecated.
Considering we shipped that in 8.4, it's time to remove all trace of
those switches, per discussion. We'd still have to wait a couple releases
before it'd be safe to use -i for something else, but it'd be a start.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/232cd63b1f26e2ee3b3e03da8fc7348f4b067946

Modified Files
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doc/src/sgml/ref/pg_dump.sgml | 10 ----------
doc/src/sgml/ref/pg_dumpall.sgml | 10 ----------
doc/src/sgml/ref/pg_restore.sgml | 10 ----------
src/bin/pg_dump/pg_dump.c | 7 +------
src/bin/pg_dump/pg_dumpall.c | 7 +------
src/bin/pg_dump/pg_restore.c | 6 +-----
6 files changed, 3 insertions(+), 47 deletions(-)