git: openjdk/leyden: premain: Remove InstanceKlass::_training_data.

[duke]

Changeset: 85c0eea0
Author:    Igor Veresov <igor.veresov at oracle.com>
Date:      2024-03-21 08:10:19 +0000
URL:       https://git.openjdk.org/leyden/commit/85c0eea0a5082ca99f39b5fccd02472942816331

Remove InstanceKlass::_training_data.

! src/hotspot/share/classfile/systemDictionaryShared.cpp
! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/oops/instanceKlass.hpp
! src/hotspot/share/oops/trainingData.cpp
! src/hotspot/share/oops/trainingData.hpp