<AWT Dev> RFR: 8263530: sun.awt.X11.ListHelper.removeAll() should use clear()

[Sergey Bylokhov]

On Fri, 12 Mar 2021 15:44:39 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> SonarCloud reports:
>   Remove or correct this "removeAll" call.
> 
>     void removeAll() {
>         items.removeAll(items); // <--- here
>         updateScrollbars();
>     }
> 
> Calling `removeAll()` with the same collection risks concurrent modification exceptions. `clear()` would be correct and more efficient.

It will be good to update the year in Copyright as well.

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Marked as reviewed by serb (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2974