clean-up some dependency warnings when generating gem
clean-up some dependency warnings when generating gem

nishaya/formtastic,justinfrench/formtastic,mikz/formtastic,justinfrench/formtastic,thenthen8515/formtastic,Guestfolio/formtastic,Davidzhu001/formtastic,mikz/formtastic,Davidzhu001/formtastic,sideci-sample/sideci-sample-formtastic,ConferenceCloud/formtastic,paulodiovani/formtastic,ConferenceCloud/formtastic,Guestfolio/formtastic,EndingChaung/formtastic,nishaya/formtastic,paulodiovani/formtastic,ryanfox1985/formtastic,justinfrench/formtastic,ryanfox1985/formtastic,EndingChaung/formtastic,ryanfox1985/formtastic,thenthen8515/formtastic