pgsql: Remove unnecessary use of PROCEDURAL

Remove unnecessary use of PROCEDURAL

Remove some unnecessary, legacy-looking use of the PROCEDURAL keyword
before LANGUAGE. We mostly don't use this anymore, so some of these
look a bit old.

There is still some use in pg_dump, which is harder to remove because
it's baked into the archive format, so I'm not touching that.

Discussion: https://www.postgresql.org/message-id/2330919b-62d9-29ac-8de3-58c024fdcb96@2ndquadrant.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/bc09d5e4cc1813c9af60c4537fe7d70ed1baae11

Modified Files
--------------
doc/src/sgml/xplang.sgml | 4 ++--
src/backend/commands/proclang.c | 7 +++----
src/include/nodes/parsenodes.h | 3 +--
src/pl/plperl/plperl--1.0.sql | 4 ++--
src/pl/plperl/plperl--unpackaged--1.0.sql | 2 +-
src/pl/plperl/plperlu--1.0.sql | 4 ++--
src/pl/plperl/plperlu--unpackaged--1.0.sql | 2 +-
src/pl/plpgsql/src/plpgsql--1.0.sql | 4 ++--
src/pl/plpgsql/src/plpgsql--unpackaged--1.0.sql | 2 +-
src/pl/plpython/plpython2u--1.0.sql | 4 ++--
src/pl/plpython/plpython2u--unpackaged--1.0.sql | 2 +-
src/pl/plpython/plpython3u--1.0.sql | 4 ++--
src/pl/plpython/plpython3u--unpackaged--1.0.sql | 2 +-
src/pl/plpython/plpythonu--1.0.sql | 4 ++--
src/pl/plpython/plpythonu--unpackaged--1.0.sql | 2 +-
src/pl/tcl/pltcl--1.0.sql | 4 ++--
src/pl/tcl/pltcl--unpackaged--1.0.sql | 2 +-
src/pl/tcl/pltclu--1.0.sql | 4 ++--
src/pl/tcl/pltclu--unpackaged--1.0.sql | 2 +-
19 files changed, 30 insertions(+), 32 deletions(-)