Integrated: Drop RuntimeType

[Maurizio Cimadamore]

On Fri, 9 Jan 2026 17:18:29 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This PR removes `RuntimeType`/`NullableClass` and related methods, as they are no longer used (after recent cleanup to `ArrayCreation`).

This pull request has now been integrated.

Changeset: ce610d8d
Author:    Maurizio Cimadamore <mcimadamore at openjdk.org>
URL:       https://git.openjdk.org/valhalla/commit/ce610d8d0f42167905bdd6c2b95d0de2d8e0eb0f
Stats:     250 lines in 7 files changed: 0 ins; 248 del; 2 mod

Drop RuntimeType

Reviewed-by: vromero

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PR: https://git.openjdk.org/valhalla/pull/1878