Revert "CSHARP-1057: Detect "jnote" errors reported by server 2.4.x."

See CSHARP-959.

This reverts commit 5c5aaa97d1f84d121a8ca0cba3521c5e1255abda.
Server 2.6 getCmdLineOpts reports --nojournal differently.
CSHARP-1057: Fix unit test.