Review comments

drivers/rkt/driver.go

@@ -218,6 +218,7 @@ func (r *RktDriver) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprin
 }
 
 func (d *RktDriver) handleFingerprint(ctx context.Context, ch chan *drivers.Fingerprint) {
+	defer close(ch)
 	ticker := time.NewTimer(0)
 	for {
 		select {

plugins/drivers/driver.go

@@ -110,10 +110,6 @@ type TaskConfig struct {
 	StderrPath      string
 }
 
-func (tc *TaskConfig) GetRawConfig() []byte {
-	return tc.rawDriverConfig
-}
-
 func (tc *TaskConfig) Copy() *TaskConfig {
 	if tc == nil {
 		return nil