pgsql: doc: Remove unused title ids

doc: Remove unused title ids

FOP issues warnings about them.  These aren't even used, so just
remove them.  For the ones that are actually used, we'll come up with
a different solution.

Discussion: https://www.postgresql.org/message-id/flat/e29b580e-79ab-a371-5ea4-6946e4d3af0b%402ndQuadrant.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/340de72780e4eb769d5cf052b03084808bac476a

Modified Files
--------------
doc/src/sgml/ecpg.sgml                     | 4 ++--
doc/src/sgml/file-fdw.sgml                 | 2 +-
doc/src/sgml/ref/commit_prepared.sgml      | 2 +-
doc/src/sgml/ref/create_foreign_table.sgml | 2 +-
doc/src/sgml/ref/create_view.sgml          | 2 +-
doc/src/sgml/ref/do.sgml                   | 2 +-
doc/src/sgml/ref/prepare_transaction.sgml  | 2 +-
doc/src/sgml/ref/rollback_prepared.sgml    | 2 +-
8 files changed, 9 insertions(+), 9 deletions(-)