Remove unused fields from MetricsService.

main.go

@@ -167,8 +167,6 @@ func NewPrometheus() *prometheus {
 	}
 
 	metricsService := &api.MetricsService{
-		Config:        &conf,
-		TargetManager: targetManager,
 		Storage: memStorage,
 	}
 

web/api/api.go

@@ -18,16 +18,12 @@ import (
 
 	"github.com/prometheus/client_golang/prometheus"
 
-	"github.com/prometheus/prometheus/config"
-	"github.com/prometheus/prometheus/retrieval"
 	"github.com/prometheus/prometheus/storage/local"
 	"github.com/prometheus/prometheus/web/httputils"
 )
 
 // MetricsService manages the /api HTTP endpoint.
 type MetricsService struct {
-	Config        *config.Config
-	TargetManager retrieval.TargetManager
 	Storage local.Storage
 }