Updates:
Status: Comment
Comment #2 on issue 3508 by adrian.lienhard: cleanUpForProduction should
really unload 'Graphics-Resources'
http://code.google.com/p/pharo/issues/detail?id=3508
No! :)
This is on purpose. There is no class category GraphicsResources but there
are class extensions *graphicsresources (you can see this when you browse
the package with MC).
The reason I did this is to be able to unload these methods without making
the package 'Graphics' dirty. These graphic resources are not needed unless
you want to recreate the icons.
Adrian