Remove config from collectors.

collector/cpu_freebsd.go

@@ -24,19 +24,16 @@ import "C"
 const ()
 
 type statCollector struct {
-	config Config
-	cpu    *prometheus.CounterVec
+	cpu *prometheus.CounterVec
 }
 
 func init() {
 	Factories["cpu"] = NewStatCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
-// network device stats.
-func NewStatCollector(config Config) (Collector, error) {
+// cpu stats.
+func NewStatCollector() (Collector, error) {
 	return &statCollector{
-		config: config,
 		cpu: prometheus.NewCounterVec(
 			prometheus.CounterOpts{
 				Namespace: Namespace,