Comment 7 for bug 946144

Hello Kyle.
I already face to the same problem, removing attributs is quite dangerous and the connector doesn't support correctly this feature (but this will come in the future).

The solution is to
- delete the attributs
- delete also the Magento Field of the product.template
- delete the contain of the magento json
- delete the mapping
- importing the attributs
- importing the product

I already did it various time for my customer, and it's work perfectly.

As we plan to refactor the support of attributs for 6.2 (we want to extract this feature in a generic modules that inherits ir.model.fields). I will try to support better the fact to remove attribut. But for now the best solution is to "not deleting attributs' or 'using my process'