[Integrated] RFR: Remove unnecessary merge test

[Robin Westberg]

Changeset: 27af764d
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-02-07 15:26:39 +0000
URL:       https://git.openjdk.java.net/skara/commit/27af764d

Remove unnecessary merge test

Reviewed-by: ehelin

! bots/pr/src/test/java/org/openjdk/skara/bots/pr/MergeTests.java