pgsql: plpython: Remove plpythonu, plpython2u and associated transform

plpython: Remove plpythonu, plpython2u and associated transform extensions.

Since 19252e8ec93 we reject Python 2 during build configuration. Now that the
dust on the buildfarm has settled, remove extension variants specific to
Python 2.

Reviewed-By: Peter Eisentraut <peter@eisentraut.org>
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20211031184548.g4sxfe47n2kyi55r@alap3.anarazel.de

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/76a29adee749f41e277459cbf2e47a2ff7777f31

Modified Files
--------------
contrib/hstore_plpython/Makefile                   |  4 ++--
contrib/hstore_plpython/hstore_plpython2u--1.0.sql | 19 -------------------
contrib/hstore_plpython/hstore_plpython2u.control  |  6 ------
contrib/hstore_plpython/hstore_plpythonu--1.0.sql  | 19 -------------------
contrib/hstore_plpython/hstore_plpythonu.control   |  6 ------
contrib/jsonb_plpython/Makefile                    |  6 +++---
contrib/jsonb_plpython/jsonb_plpython2u--1.0.sql   | 19 -------------------
contrib/jsonb_plpython/jsonb_plpython2u.control    |  6 ------
contrib/jsonb_plpython/jsonb_plpythonu--1.0.sql    | 19 -------------------
contrib/jsonb_plpython/jsonb_plpythonu.control     |  6 ------
contrib/ltree_plpython/Makefile                    |  4 ++--
contrib/ltree_plpython/ltree_plpython2u--1.0.sql   | 12 ------------
contrib/ltree_plpython/ltree_plpython2u.control    |  6 ------
contrib/ltree_plpython/ltree_plpythonu--1.0.sql    | 12 ------------
contrib/ltree_plpython/ltree_plpythonu.control     |  6 ------
src/pl/plpython/plpython2u--1.0.sql                | 17 -----------------
src/pl/plpython/plpython2u.control                 |  7 -------
src/pl/plpython/plpythonu--1.0.sql                 | 17 -----------------
src/pl/plpython/plpythonu.control                  |  7 -------
19 files changed, 7 insertions(+), 191 deletions(-)