RFR: JDK-8274977: Remove expandPacked and extendEdge from awt_ImagingLib.c

[Phil Race]

On Fri, 8 Oct 2021 14:25:18 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Please review this small cleanup change.
> Looks like expandPacked and extendEdge from awt_ImagingLib.c are unreferenced/unused and can be removed.
> 
> Thanks, Matthias

There's unresolved discussion here so it needs review and approval from some one who works in this area

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PR: https://git.openjdk.java.net/jdk/pull/5866