Chore: Remove prometheusUsesCombobox feature toggle (#103940)

* remove prometheusUsesCombobox feature toggle

* betterer

* fix the unit test

* create MetricsLabelsSection unit tests

* fix unit tests

* fix unit tests in PromQueryBuilder.test.tsx

* prettier

* remove timeouts

* Revert "remove timeouts"

This reverts commit 84af1fd46b.

pkg/services/featuremgmt/registry.go

@@ -1304,13 +1304,6 @@ var (
 			Stage:       FeatureStageExperimental,
 			Owner:       grafanaFrontendPlatformSquad,
 		},
-		{
-			Name:        "prometheusUsesCombobox",
-			Description: "Use new **Combobox** component for Prometheus query editor",
-			Stage:       FeatureStageGeneralAvailability,
-			Owner:       grafanaOSSBigTent,
-			Expression:  "true", // enabled by default
-		},
 		{
 			Name:        "azureMonitorDisableLogLimit",
 			Description: "Disables the log limit restriction for Azure Monitor when true. The limit is enabled by default.",

pkg/services/featuremgmt/toggles_gen.csv

@@ -170,7 +170,6 @@ managedDualWriter,experimental,@grafana/search-and-storage,false,false,false
 pluginsSriChecks,GA,@grafana/plugins-platform-backend,false,false,false
 unifiedStorageBigObjectsSupport,experimental,@grafana/search-and-storage,false,false,false
 timeRangeProvider,experimental,@grafana/grafana-frontend-platform,false,false,false
-prometheusUsesCombobox,GA,@grafana/oss-big-tent,false,false,false
 azureMonitorDisableLogLimit,GA,@grafana/partner-datasources,false,false,false
 preinstallAutoUpdate,GA,@grafana/plugins-platform-backend,false,false,false
 playlistsReconciler,experimental,@grafana/grafana-app-platform-squad,false,true,false

pkg/services/featuremgmt/toggles_gen.go

@@ -691,10 +691,6 @@ const (
 	// Enables time pickers sync
 	FlagTimeRangeProvider = "timeRangeProvider"
 
-	// FlagPrometheusUsesCombobox
-	// Use new **Combobox** component for Prometheus query editor
-	FlagPrometheusUsesCombobox = "prometheusUsesCombobox"
-
 	// FlagAzureMonitorDisableLogLimit
 	// Disables the log limit restriction for Azure Monitor when true. The limit is enabled by default.
 	FlagAzureMonitorDisableLogLimit = "azureMonitorDisableLogLimit"

pkg/services/featuremgmt/toggles_gen.json

@@ -2657,7 +2657,8 @@
       "metadata": {
         "name": "prometheusUsesCombobox",
         "resourceVersion": "1743693517832",
-        "creationTimestamp": "2024-10-23T11:18:33Z"
+        "creationTimestamp": "2024-10-23T11:18:33Z",
+        "deletionTimestamp": "2025-04-11T19:25:28Z"
       },
       "spec": {
         "description": "Use new **Combobox** component for Prometheus query editor",