RFR: 8376703: Some coding in libjimage seems to be not called at all or not called from PRODUCT code [v2]

[Matthias Baesken]

> libjimage has a few unused functions/methods; those are listed when logging elimination with  -Wl,--gc-sections -Wl,--print-gc-sections .
> We could remove them (or with if are still needed for completeness  put them into  #if 0 ) to reduce lib size on Linux and AIX.
> On Windows and macOS it seems the compiler/linker default settings are good enough to eliminate the code.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Adjust COPYRIGHT headers

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29502/files
  - new: https://git.openjdk.org/jdk/pull/29502/files/bcfda923..8a68ef39

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29502&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29502&range=00-01

  Stats: 4 lines in 4 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/29502.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29502/head:pull/29502

PR: https://git.openjdk.org/jdk/pull/29502