RFR: 8301148: Serial: Remove ContiguousSpace::reset_saved_mark

[Thomas Schatzl]

On Thu, 26 Jan 2023 12:13:14 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing redundant code.
> 
> Test: hotspot_gc

Marked as reviewed by tschatzl (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12215