pgsql: Remove error message hints mentioning configure options

Remove error message hints mentioning configure options

These are usually not useful since users will use packaged
distributions and won't be interested in rebuilding their installation
from source. Also, we have only used these kinds of hints for some
features and in some places, not consistently throughout.

Reviewed-by: Andres Freund <andres(at)anarazel(dot)de>
Reviewed-by: Daniel Gustafsson <daniel(at)yesql(dot)se>
Reviewed-by: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Discussion: https://www.postgresql.org/message-id/flat/2552aed7-d0e9-280a-54aa-2dc7073f371d%40enterprisedb.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/708007dced2b05ed9b4f1963e91b2eb67413bd19

Modified Files
--------------
src/backend/access/common/toast_compression.c | 3 +-
src/backend/libpq/hba.c | 2 -
src/backend/utils/adt/pg_locale.c | 6 +-
src/backend/utils/adt/xml.c | 3 +-
src/bin/initdb/initdb.c | 1 -
src/test/regress/expected/compression_1.out | 5 -
src/test/regress/expected/xml_1.out | 163 --------------------------
src/test/regress/expected/xmlmap_1.out | 28 -----
8 files changed, 4 insertions(+), 207 deletions(-)