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(at)eisentraut(dot)org>
Reviewed-By: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)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
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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(-)