RFR: 8326111: JFR: Cleanup for JFR_ONLY [v2]

[Denghui Dong]

> Greeting,
> 
> Could I have a review of this trivial change that cleans up code where used JFR_ONLY incorrectly?
> 
> testing: build with --enable-jvm-feature-jfr and --disable-jvm-feature-jfr
> 
> Denghui

Denghui Dong has updated the pull request incrementally with one additional commit since the last revision:

  more cleanup

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17903/files
  - new: https://git.openjdk.org/jdk/pull/17903/files/fb3fcab2..75710690

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17903&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17903&range=00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/17903.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17903/head:pull/17903

PR: https://git.openjdk.org/jdk/pull/17903