RFR: 8358089: Remove the GenerateKeyList.java test tool [v2]

[Justin Lu]

> Please review this PR which removes the test tool `GenerateKeyList.java` after the COMPAT locale data removal.
> 
> `LocaleDataTest.java` may optionally use the `GenerateKeyList.java` tool. However, this tool is manually used and was primarily used for COMPAT data. There is no longer any point to keep it, and it can always be retrieved via the VCS if needed.

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  reflect some corrections

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25527/files
  - new: https://git.openjdk.org/jdk/pull/25527/files/f4313c47..807486d2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25527&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25527&range=00-01

  Stats: 98 lines in 2 files changed: 0 ins; 97 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25527.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25527/head:pull/25527

PR: https://git.openjdk.org/jdk/pull/25527