Deleted class drops error message unknown>:0: error: no such file or directory:
Make sure in your target settings, under Build Phases > Compile Sources that your file isn't listed there:
Also, just check it somehow hasn't been added to Copy Bundle Resources.
If you're developing a pod, and the deleted file is in the pod, try pod install to rebuild the framework.
Check if the deleted files are still in Project, if yes, delete. build ...