RFR: JDK10 JDK-8180286: Remove the launchers data model flags -d32/-d64

[Kumar Srinivasan]

Hello,

Please review the removal of the launcher options -d32/-d64 from the
launcher's help, the implementations were removed with JDK-8169646,
but the help part was overlooked.

JBS: https://bugs.openjdk.java.net/browse/JDK-8180286
webrev: http://cr.openjdk.java.net/~ksrini/8180286/webrev.00/

Thanks
Kumar