Dataplane: feature toggle cleanup dataplane frontend fallback (#113542)

* remove feature toggle dataplaneFrontendFallback because GA

* remove feature toggle logic

* fix import

* fix toggle ownership from merging main

* merge main

* fix extra feature toggle

pkg/services/featuremgmt/registry.go

@@ -191,15 +191,6 @@ var (
 			Stage:       FeatureStageExperimental,
 			Owner:       grafanaObservabilityLogsSquad,
 		},
-		{
-			Name:           "dataplaneFrontendFallback",
-			Description:    "Support dataplane contract field name change for transformations and field name matchers where the name is different",
-			Stage:          FeatureStageGeneralAvailability,
-			FrontendOnly:   true,
-			Expression:     "true",
-			Owner:          grafanaObservabilityMetricsSquad,
-			AllowSelfServe: true,
-		},
 		{
 			Name:        "disableSSEDataplane",
 			Description: "Disables dataplane specific processing in server side expressions.",

pkg/services/featuremgmt/toggles_gen.csv

@@ -23,7 +23,6 @@ kubernetesStars,experimental,@grafana/grafana-app-platform-squad,false,true,fals
 influxqlStreamingParser,experimental,@grafana/partner-datasources,false,false,false
 influxdbRunQueriesInParallel,privatePreview,@grafana/partner-datasources,false,false,false
 lokiLogsDataplane,experimental,@grafana/observability-logs,false,false,false
-dataplaneFrontendFallback,GA,@grafana/observability-metrics,false,false,true
 disableSSEDataplane,experimental,@grafana/grafana-datasources-core-services,false,false,false
 unifiedRequestLog,GA,@grafana/grafana-backend-group,false,false,false
 renderAuthJWT,preview,@grafana/grafana-operator-experience-squad,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -103,10 +103,6 @@ const (
 	// Changes logs responses from Loki to be compliant with the dataplane specification.
 	FlagLokiLogsDataplane = "lokiLogsDataplane"
 
-	// FlagDataplaneFrontendFallback
-	// Support dataplane contract field name change for transformations and field name matchers where the name is different
-	FlagDataplaneFrontendFallback = "dataplaneFrontendFallback"
-
 	// FlagDisableSSEDataplane
 	// Disables dataplane specific processing in server side expressions.
 	FlagDisableSSEDataplane = "disableSSEDataplane"

pkg/services/featuremgmt/toggles_gen.json

@@ -1258,7 +1258,8 @@
       "metadata": {
         "name": "dataplaneFrontendFallback",
         "resourceVersion": "1753448760331",
-        "creationTimestamp": "2023-04-07T21:13:19Z"
+        "creationTimestamp": "2023-04-07T21:13:19Z",
+        "deletionTimestamp": "2025-11-06T17:39:31Z"
       },
       "spec": {
         "description": "Support dataplane contract field name change for transformations and field name matchers where the name is different",
@@ -4088,6 +4089,7 @@
         "name": "timeRangePan",
         "resourceVersion": "1762290731154",
         "creationTimestamp": "2025-10-24T19:49:53Z",
+        "deletionTimestamp": "2025-11-06T17:39:31Z",
         "annotations": {
           "grafana.app/updatedTimestamp": "2025-11-04 21:12:11.154822 +0000 UTC"
         }