Remove obsolete collation test.

Thomas Munro <tmunro@postgresql.org>

Commit: cce95a2f029e546dc461d7ec1760e2c3a247b0e7
Author: Thomas Munro <tmunro@postgresql.org>
Date: 2019-10-16T05:02:23Z
Releases: 13.0
Remove obsolete collation test.

The previous commit forgot to remove this test, which no longer
holds on all systems.

Files