remove old internal metrics lib

pkg/api/metrics.go

@@ -2,13 +2,10 @@ package api
 
 import (
 	"context"
-	"encoding/json"
-	"net/http"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/components/simplejson"
-	"github.com/grafana/grafana/pkg/metrics"
 	"github.com/grafana/grafana/pkg/middleware"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/tsdb"
@@ -79,58 +76,6 @@ func GetTestDataScenarios(c *middleware.Context) Response {
 	return Json(200, &result)
 }
 
-func GetInternalMetrics(c *middleware.Context) Response {
-	if metrics.UseNilMetrics {
-		return Json(200, util.DynMap{"message": "Metrics disabled"})
-	}
-
-	snapshots := metrics.MetricStats.GetSnapshots()
-
-	resp := make(map[string]interface{})
-
-	for _, m := range snapshots {
-		metricName := m.Name() + m.StringifyTags()
-
-		switch metric := m.(type) {
-		case metrics.Gauge:
-			resp[metricName] = map[string]interface{}{
-				"value": metric.Value(),
-			}
-		case metrics.Counter:
-			resp[metricName] = map[string]interface{}{
-				"count": metric.Count(),
-			}
-		case metrics.Timer:
-			percentiles := metric.Percentiles([]float64{0.25, 0.75, 0.90, 0.99})
-			resp[metricName] = map[string]interface{}{
-				"count": metric.Count(),
-				"min":   metric.Min(),
-				"max":   metric.Max(),
-				"mean":  metric.Mean(),
-				"std":   metric.StdDev(),
-				"p25":   percentiles[0],
-				"p75":   percentiles[1],
-				"p90":   percentiles[2],
-				"p99":   percentiles[3],
-			}
-		}
-	}
-
-	var b []byte
-	var err error
-	if b, err = json.MarshalIndent(resp, "", " "); err != nil {
-		return ApiError(500, "body json marshal", err)
-	}
-
-	return &NormalResponse{
-		body:   b,
-		status: 200,
-		header: http.Header{
-			"Content-Type": []string{"application/json"},
-		},
-	}
-}
-
 // Genereates a index out of range error
 func GenerateError(c *middleware.Context) Response {
 	var array []string