git: openjdk/jdk: 8302108: Clean up placeholder supername code

[Coleen Phillimore]

Changeset: abbeb7e4
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2023-02-13 20:57:01 +0000
URL:       https://git.openjdk.org/jdk/commit/abbeb7e4d2f5739dff77b2c79e675fb69368db1e

8302108: Clean up placeholder supername code

Reviewed-by: dholmes, iklam

! src/hotspot/share/classfile/placeholders.cpp
! src/hotspot/share/classfile/placeholders.hpp
! src/hotspot/share/oops/symbolHandle.hpp
! test/hotspot/gtest/classfile/test_placeholders.cpp