RFR: 8338571: [TestBug] DefaultCloseOperation.java test not working as expected wrt instruction after JDK-8325851 fix

[Sharath TN]

Fixed test and fix is working fine. 

Fix
testUI(DefaultCloseOperation::createUI) will create PassfailJFrame test windows when test starts.

PassFailJFrame.addTestWindow(testFrame);
PassFailJFrame.addTestWindow(testDialog);

Above code exists in the Test. So TestFrame and TestDailog windows will be created when testUI(DefaultCloseOperation::createUI) invoked.

Need to remove above code as this code is not required.

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Commit messages:
 - 8338571: [TestBug] DefaultCloseOperation.java test not working as expected wrt instruction after JDK-8325851 fix

Changes: https://git.openjdk.org/jdk/pull/21061/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21061&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338571
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21061.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21061/head:pull/21061

PR: https://git.openjdk.org/jdk/pull/21061