Uninstall Fabric for iOS from Mac
Remove the Fabric Folder from your system 
. Go to Your app, and remove Fabric.framework. Then follow this to remove app from Crashlytics/Fabric. Also delete Run Script in Build Phases
Remove the Fabric Folder from your system . Go to Your app, and remove Fabric.framework. Then follow this to remove app from Crashlytics/Fabric. Also delete Run Script in Build Phases