RFR: 8333779: Parallel: Remove Summary phase related debug print during Full GC

[Thomas Schatzl]

On Fri, 7 Jun 2024 09:21:07 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing debug-only prints/methods with limited usefulness.

lgtm and trivial.

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Marked as reviewed by tschatzl (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/19593#pullrequestreview-2107531501