Remove crosswalk from published app

I am tryng to update an old app made using crosswalk, i upload two diferent apk to the play store one for armv7 and other for x86, since crosswalk created two versions of the apk

I want to upload a new release where i no longer use crosswalk, i am getting only one apk not anymore two apk, but i get a message that old users who are currently using armv7 and x86 versions wont be upgraded

My questin is , how can i create two apk wihtout crosswalk so my old users get the update