RFR: 8357687: Remove unnecessary Map.containsKey from GraphicsEnvironment implementations

[Sergey Bylokhov]

On Thu, 29 May 2025 22:21:12 GMT, Phil Race <prr at openjdk.org> wrote:

> it is more readable (subjective)

Funny... when I first wrote this code I thought that style was better, but now I see it differently. But yeah, it is subjective.

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PR Comment: https://git.openjdk.org/jdk/pull/24907#issuecomment-2920818521