JDK-8267126 provided a significant refactoring and renaming from the old javadoc `Messager` class to `JavadocLog`.

As a result, some resources properties became unused: specifically, those of the form `javadoc.*.msg` and `javadoc.*.pos.msg` as exemplified in this code that was deleted in the fix for JDK-8267126.

  private void report(DiagnosticType type, String pos, String msg) {
        switch (type) {
            case ERROR:
            case WARNING:
                Object prefix = (pos == null) ? programName : pos;
                report(javadocDiags.create(type, null, null, "msg", prefix, msg));
                break;

            case NOTE:
                String key = (pos == null) ? "msg" : "pos.msg";
                report(javadocDiags.create(type, null, null, key, pos, msg));
                break;

            default:
                throw new IllegalArgumentException(type.toString());
        }
    }