RFR: 8325042: remove unused JVMDITools test files

[Kim Barrett]

Please review this trivial change to remove some unused files.

Testing: mach5 tier1

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Commit messages:
 - remove JVMDITools files

Changes: https://git.openjdk.org/jdk/pull/17650/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17650&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325042
  Stats: 200 lines in 3 files changed: 0 ins; 200 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17650.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17650/head:pull/17650

PR: https://git.openjdk.org/jdk/pull/17650