Removed duplicate/stale TODOs

PiperOrigin-RevId: 215162121
Change-Id: I35f06ac3235cf31c9e8a158dcf6261a7ded6c4c4

runsc/cmd/kill.go

@@ -80,8 +80,6 @@ func (k *Kill) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 	if err != nil {
 		Fatalf("%v", err)
 	}
-	// TODO: Distinguish between already-exited containers and
-	// genuine errors.
 	if err := c.Signal(sig, k.all); err != nil {
 		Fatalf("%v", err)
 	}

runsc/container/container.go

@@ -483,7 +483,6 @@ func (c *Container) Signal(sig syscall.Signal, all bool) error {
 	if !c.isSandboxRunning() {
 		return fmt.Errorf("container is not running")
 	}
-	// TODO: Query the container for its state, then save it.
 	return c.Sandbox.Signal(c.ID, sig, all)
 }