RFR: 8323794: Remove unused jimage compressor plugin configuration

[Jim Laskey]

On Tue, 16 Jan 2024 10:55:07 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> There's an unused concept of a pluginConfig that is passed into the jlink compress plugins, however we always pass null here and the code seems broken (the pluginConfig wouldn't have been stored properly). This seem to be a left-over from a more generic plugin design that never came to fruition.
> 
> This PR cleans out this code from the plugins and decompressors, while keeping the compressed header format intact for backwards compatibility (and in case we want to revisit this in the future)

Changes requested by jlaskey (Reviewer).

src/java.base/share/classes/jdk/internal/jimage/decompressor/CompressedResourceHeader.java line 104:

> 102:         ByteBuffer buffer = ByteBuffer.wrap(resource, 0, SIZE);
> 103:         buffer.order(order);
> 104:         int magic = buffer.getInt(0);

Named constant for offsets?

src/java.base/share/classes/jdk/internal/jimage/decompressor/CompressedResourceHeader.java line 108:

> 106:             return null;
> 107:         }
> 108:         long size = buffer.getLong(4);

Named constant for offsets?

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PR Review: https://git.openjdk.org/jdk/pull/17443#pullrequestreview-1823928256
PR Review Comment: https://git.openjdk.org/jdk/pull/17443#discussion_r1453640996
PR Review Comment: https://git.openjdk.org/jdk/pull/17443#discussion_r1453641242