RFR: 8350952: Remove some non present files from OPT_SPEED_SRC list

[Christoph Langer]

On Tue, 4 Mar 2025 16:11:22 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> JvmFeatures.gmk contains a file list OPT_SPEED_SRC , the list contains files that have to be optimized for speed when the other files are optimized for binary size.
> However some non present files are mentioned and should be removed e.g.
> genCollectedHeap.cpp
> hashtable.cpp
> markSweep.cpp
> Maybe they were present in old releases.

Marked as reviewed by clanger (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23902#pullrequestreview-2660656842