RFR: 6897: Remove unused javax imports

Wed Sep 2 18:41:55 UTC 2020

On Wed, 26 Aug 2020 18:20:01 GMT, Jie Kang <jkang at openjdk.org> wrote:

> JMC seemed to run fine with this patch. I was able to use the MXBeanBrowser, dump a flight recording of JMC and view
> the flight recording.

Marked as reviewed by hirt (Lead).

Found an unrelated bug when trying it out, but it seems this is ok.

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PR: https://git.openjdk.java.net/jmc/pull/106