Thanks Otto!
The reason I ask, is that I have a looooot of images which keeps tmiing out during import (256M memory and 500 sec script limit on server). So, my plan was to import just the markup, then leave the images on Google for now. Maybe use https://www.ads-software.com/plugins/media-tools/ to import the external images afterwards so the thumbs can be regenerated.
The Blogger_Importer class seems to have this option:
const IMPORT_IMG = true; // Should we import the images (boolean)
I tried changing IMPORT_IMG to false, but no luck.
Hopefully this can be a added as an option in future. For now, the only option is https://www.ads-software.com/plugins/blogger-importer-extended/ which somehow works around the memory issue by automatically restarting. However, it’s a pretty crappy plugin that breaks slugs with certain character sets.