createlang, droplang, and the tsearch2 module were all removed in the
10.0 release. More details are in the release notes:
https://www.postgresql.org/docs/10/release-10.html
Signed-off-by: Robert Joslyn <robert.joslyn@redrectangle.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
