RFR: 8149: Cleanup project files after JMC-7307 [v3]

Sun Dec 3 11:46:26 UTC 2023

> [JMC-7307](https://bugs.openjdk.org/browse/JMC-7307) moved org.openjdk.jmc.flightrecorder.configuration to core. After that, there are a few plugin related files that are obsolete.
> 
> Also, with latest Eclipse there are some changes in the .classpath files that get generated, e.g. when reimporting Maven projects. We should clean this up and unify .classpath files.

Christoph Langer has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright years

-------------

Changes:
  - all: https://git.openjdk.org/jmc/pull/534/files
  - new: https://git.openjdk.org/jmc/pull/534/files/1d21b988..6dda489b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=534&range=02
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=534&range=01-02

  Stats: 4 lines in 3 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmc/pull/534.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/534/head:pull/534

PR: https://git.openjdk.org/jmc/pull/534