RFR: 8362289: [macOS] Remove finalize method in JRSUIControls.java

[Phil Race]

Eliminate a finalize() method in the Swing macOS implementation.

I tested that the dispose method is being called by running this small test in combination with some 'println' statements in the source code (now removed)

import javax.swing.JTabbedPane;
import javax.swing.plaf.TabbedPaneUI;

public class CreateTabbedPaneUIStressTest {

   public static void main(String[] args) {
       for (int i=0; i<1000000000; i++) {
           JTabbedPane jtp = new JTabbedPane();
           TabbedPaneUI tpui = jtp.getUI();
       }
   }
}


I also monitored the process size using 'top'.
And when I commented out the native call that did the free and re-tested I saw process size grow.

Turning the above into a useful regression test doesn't seem possible to me.
Limiting Java heap is pointless (and I did use -Xmx20m) since it is a native resource that is to be freed and failure to dispose won't show up as a problem without taking down the machine.

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Commit messages:
 - 8362289
 - 8362289

Changes: https://git.openjdk.org/jdk/pull/26331/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26331&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8362289
  Stats: 22 lines in 1 file changed: 17 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/26331.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26331/head:pull/26331

PR: https://git.openjdk.org/jdk/pull/26331