pgsql: Remove contrib/tsearch2.

Remove contrib/tsearch2.

This module was intended to ease migrations of applications that used
the pre-8.3 version of text search to the in-core version introduced
in that release. However, since all pre-8.3 releases of the database
have been out of support for more than 5 years at this point, we
expect that few people are depending on it at this point. If some
people still need it, nothing prevents it from being maintained as a
separate extension, outside of core.

Discussion: http://postgr.es/m/CA+Tgmob5R8aDHiFRTQsSJbT1oreKg2FOSBrC=2f4tqEH3dOMAg@mail.gmail.com

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/7ada2d31f47f1d378ae7d4ee2d044df1bb2b0c6a

Modified Files
--------------
.gitattributes | 1 -
contrib/Makefile | 1 -
contrib/tsearch2/.gitignore | 4 -
contrib/tsearch2/Makefile | 20 -
contrib/tsearch2/data/test_tsearch.data | 508 ----
contrib/tsearch2/expected/tsearch2.out | 2977 ------------------------
contrib/tsearch2/sql/tsearch2.sql | 339 ---
contrib/tsearch2/tsearch2--1.0.sql | 576 -----
contrib/tsearch2/tsearch2--unpackaged--1.0.sql | 144 --
contrib/tsearch2/tsearch2.c | 542 -----
contrib/tsearch2/tsearch2.control | 7 -
doc/src/sgml/contrib.sgml | 1 -
doc/src/sgml/filelist.sgml | 1 -
doc/src/sgml/textsearch.sgml | 83 -
doc/src/sgml/tsearch2.sgml | 203 --
src/test/modules/test_parser/test_parser.c | 1 -
src/tools/msvc/Mkvcbuild.pm | 2 +-
17 files changed, 1 insertion(+), 5409 deletions(-)