The system property `java.compiler` has been removed from the list of standard system properties.

Running with this system property set on the command line will now print a warning to say that the system property is obsolete; it has no other effect. In previous releases, running with `-Djava.compiler` or `-Djava.compiler=NONE` on the command line selected interpreter only execution mode. If needed, the `-Xint` option can be used to run in interpreter only mode.