Revert "Prometheus: Type and flavor configuration (#56496)" (#57552)

This reverts commit 7ecbc98b3e.

pkg/tsdb/prometheus/prometheus.go

@@ -6,9 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
-	"strings"
 	"sync"
-	"time"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/datasource"
@@ -21,7 +19,6 @@ import (
 	"github.com/grafana/grafana/pkg/tsdb/prometheus/buffered"
 	"github.com/grafana/grafana/pkg/tsdb/prometheus/querydata"
 	"github.com/grafana/grafana/pkg/tsdb/prometheus/resource"
-	"github.com/patrickmn/go-cache"
 	apiv1 "github.com/prometheus/client_golang/api/prometheus/v1"
 	"github.com/yudai/gojsondiff"
 	"github.com/yudai/gojsondiff/formatter"
@@ -35,10 +32,9 @@ type Service struct {
 }
 
 type instance struct {
-	buffered     *buffered.Buffered
-	queryData    *querydata.QueryData
-	resource     *resource.Resource
-	versionCache *cache.Cache
+	buffered  *buffered.Buffered
+	queryData *querydata.QueryData
+	resource  *resource.Resource
 }
 
 func ProvideService(httpClientProvider httpclient.Provider, cfg *setting.Cfg, features featuremgmt.FeatureToggles, tracer tracing.Tracer) *Service {
@@ -79,10 +75,9 @@ func newInstanceSettings(httpClientProvider httpclient.Provider, cfg *setting.Cf
 		}
 
 		return instance{
-			buffered:     b,
-			queryData:    qd,
-			resource:     r,
-			versionCache: cache.New(time.Minute*1, time.Minute*5),
+			buffered:  b,
+			queryData: qd,
+			resource:  r,
 		}, nil
 	}
 }
@@ -140,20 +135,6 @@ func (s *Service) CallResource(ctx context.Context, req *backend.CallResourceReq
 		return err
 	}
 
-	if strings.EqualFold(req.Path, "version-detect") {
-		versionObj, found := i.versionCache.Get("version")
-		if found {
-			return sender.Send(versionObj.(*backend.CallResourceResponse))
-		}
-
-		vResp, err := i.resource.DetectVersion(ctx, req)
-		if err != nil {
-			return err
-		}
-		i.versionCache.Set("version", vResp, cache.DefaultExpiration)
-		return sender.Send(vResp)
-	}
-
 	resp, err := i.resource.Execute(ctx, req)
 	if err != nil {
 		return err