RFR: 8315728: [testbug] SystemMenuBarTest prints "FAILED IS: false"

[Lukasz Kostyra]

Printed line was right above the assertion testing the printed `failed` value. Failing assertion will print the value of `failed` regardless, so the printed line was redundant.

-------------

Commit messages:
 - 8315728: [testbug] SystemMenuBarTest prints "FAILED IS: false"

Changes: https://git.openjdk.org/jfx/pull/1233/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1233&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315728
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1233.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1233/head:pull/1233

PR: https://git.openjdk.org/jfx/pull/1233