RFR: 8358003: KlassTrainingData initializer reads garbage holder [v4]

[Igor Veresov]

> Simplify KlassTrainingData constructor. The lines in question come from the old pre-CDS world. They are not needed anymore.

Igor Veresov has updated the pull request incrementally with one additional commit since the last revision:

  More changes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25623/files
  - new: https://git.openjdk.org/jdk/pull/25623/files/f8a9b4a3..5a7b128f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25623&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25623&range=02-03

  Stats: 2 lines in 2 files changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25623.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25623/head:pull/25623

PR: https://git.openjdk.org/jdk/pull/25623