There are some remaining references to JRE_HOME, I think they are not needed any more and could be removed.

jdk/src/hotspot/share/jfr/dcmd/jfrDcmds.cpp
345 _settings("settings", "Settings file(s), e.g. profile or default. See JRE_HOME/lib/jfr", "STRING SET", false),

/openjdk-jdk/src/java.base/share/man/java.1
1813 \f[CB]JRE_HOME/lib/jfr\f[R].