Not sure what's the reason for that error, nevertheless that are unsused references, this means, that there are no errors if you removed from the eSpace.
Could you give it a try?
I am not sure about what are you trying to implement, if if it's the right move to add references to applications that we are building...
Did you have the opportunity to check this discussion about Outsystems Now customization?
http://www.outsystems.com/forums/discussion/17350/how-to-customize-outsystems-now-for-ios/
Best regards,
Daniel Martins