RFR: 8308588: Unnecessary synchronized on GTKStyle#ICONS_MAP can be removed

[Prasanta Sadhukhan]

On Thu, 29 Aug 2024 04:09:18 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

> Basically I ran the regression tests for linux platform which is supposed to have GTK environment. Added the CI link in JBS.

FWIW, Running tests on linux environment will test it on default MetalL&F which will not test this GTK path unless you specify GTK L&F in `swing.defaultlaf` to it

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PR Comment: https://git.openjdk.org/jdk/pull/20741#issuecomment-2316736721