Remove references and example of Commons Attributes usage for the JMX chapter [SPR-6338]

[spring-projects-issues]

Thomas Risberg opened SPR-6338 and commented

Remove references and example of Commons Attributes usage for the JMX chapter.

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Affects: 3.0 RC1

[spring-projects-issues]

Luke Taylor commented

I've updated the section on source-level metadata to use annotations exclusively and removed all references to commons attributes.