Feature toggles: remove lokiMetricDataplane (#97024)

* Feature toggles: remove lokiMetricDataplane

* Framing: remove test cases expecting metricDataplane to be false

* Remove test code

* Chore: rename test cases

pkg/services/featuremgmt/registry.go

@@ -316,14 +316,6 @@ var (
 			FrontendOnly: false,
 			Owner:        grafanaObservabilityMetricsSquad,
 		},
-		{
-			Name:           "lokiMetricDataplane",
-			Description:    "Changes metric responses from Loki to be compliant with the dataplane specification.",
-			Stage:          FeatureStageGeneralAvailability,
-			Expression:     "true",
-			Owner:          grafanaObservabilityLogsSquad,
-			AllowSelfServe: true,
-		},
 		{
 			Name:        "lokiLogsDataplane",
 			Description: "Changes logs responses from Loki to be compliant with the dataplane specification.",

pkg/services/featuremgmt/toggles_gen.csv

@@ -40,7 +40,6 @@ influxdbBackendMigration,GA,@grafana/observability-metrics,false,false,true
 influxqlStreamingParser,experimental,@grafana/observability-metrics,false,false,false
 influxdbRunQueriesInParallel,privatePreview,@grafana/observability-metrics,false,false,false
 prometheusRunQueriesInParallel,privatePreview,@grafana/observability-metrics,false,false,false
-lokiMetricDataplane,GA,@grafana/observability-logs,false,false,false
 lokiLogsDataplane,experimental,@grafana/observability-logs,false,false,false
 dataplaneFrontendFallback,GA,@grafana/observability-metrics,false,false,true
 disableSSEDataplane,experimental,@grafana/observability-metrics,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -171,10 +171,6 @@ const (
 	// Enables running Prometheus queries in parallel
 	FlagPrometheusRunQueriesInParallel = "prometheusRunQueriesInParallel"
 
-	// FlagLokiMetricDataplane
-	// Changes metric responses from Loki to be compliant with the dataplane specification.
-	FlagLokiMetricDataplane = "lokiMetricDataplane"
-
 	// FlagLokiLogsDataplane
 	// Changes logs responses from Loki to be compliant with the dataplane specification.
 	FlagLokiLogsDataplane = "lokiLogsDataplane"