The rmic tool was deprecated for removal in JDK 13. See JDK-8217412. It should be removed from the build system so that it is no longer delivered as part of the JDK build bundle. The rmic tool "man page" should also be removed. There are mentions of rmic elsewhere, such as in the class documentation for java.rmi.server.UnicastRemoteObject; these should be cleaned up too.
Since JDK_-8241073 There is no dependency on rmic in the JDK so RMIC be removed directly.