RFR: 8297265: G1: Remove unnecessary null-check in RebuildCodeRootClosure::do_code_blob

[Thomas Schatzl]

On Fri, 18 Nov 2022 14:33:23 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing an unnecessary check.
> 
> Test: hotspot_gc

Lgtm and trivial, assuming some testing has been done.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11242