Removing an obsolete class

I found I have to obsolete classes, but I can't remove them from the system.

GptDatedModel subclass: 'AnObsoleteAnObsoleteGptRouteItemRegistration'
instanceVariableNames: 'routeItem'
classVariableNames: ''
poolDictionaries: ''
category: 'nil'

They show in the "_UnpackagedPackage"

UndefinedObject(Object)>>doesNotUnderstand: #isByteString
ByteSymbol(String)>>compare:with:collated:
ByteSymbol(String)>>compare:caseSensitive:
ByteSymbol(String)>>sameAs:
RPackageOrganizer>>packageNamed:ifAbsent: in Block: [:each | each
sameAs: aSymbol]
Array(Collection)>>detect:ifNone: in Block: [:each | ...
Array(SequenceableCollection)>>do:
Array(Collection)>>detect:ifNone:
RPackageOrganizer>>packageNamed:ifAbsent:
RPackageOrganizer>>packageNamed:
NautilusUI(AbstractNautilusUI)>>classRemoved:
WeakMessageSend>>value:
WeakMessageSend>>cull:
WeakMessageSend>>cull:cull:
WeakAnnouncementSubscription>>deliver: in Block: [action cull:
anAnnouncement cull: announcer]
BlockClosure>>on:do:
BlockClosure>>on:fork: in Block: [Processor terminateActive]


What should I do?

This is Pharo 2.0 with an image built in December.

Regards,

Esteban A. Maringolo

This is still in the image, adding "AnObsolete" prefix everytime I
want to remove it... :-/

AnObsoleteAnObsoleteAnObsoleteAnObsoleteGptRouteItemRegistration

How Obsolete it must be before it's gone?

:)


Esteban A. Maringolo