RFR: 8368961: Remove redundant checks in ciField.cpp [v2]

[Zihao Lin]

> Remove redundant check in 'trust_final_non_static_fields' ciField.cpp
> 
> Remove:
> 1. java_lang_System check
> 2. is_box_klass check
> 3. java_lang_String check

Zihao Lin has updated the pull request incrementally with one additional commit since the last revision:

  remove

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/28191/files
  - new: https://git.openjdk.org/jdk/pull/28191/files/215e71a2..36f8bce1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28191&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28191&range=00-01

  Stats: 6 lines in 1 file changed: 0 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28191.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28191/head:pull/28191

PR: https://git.openjdk.org/jdk/pull/28191