Do not close pod sync, use context cancel instead. (#402)

Closing the channel is racey and can lead to a panic on exit.
Instead rely on context cancellation to know if workers should exit.

root.go

@@ -95,7 +95,6 @@ This allows users to schedule kubernetes workloads on nodes that aren't running
 		signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
 		go func() {
 			<-sig
-			f.Stop()
 			cancel()
 		}()