Remove jaegerBackendMigration feature toggle (#107702)

* remove feature toggle if statements

* remove unused impoerts

* remove unused private functions

* prettier

* official ft removal

* fix some failing tests in datasource.test.ts

* clean up test file

* update test names

* remove tests for testDatasource

* remove describe

* tests

* fix import order

* betterer

pkg/services/featuremgmt/registry.go

@@ -1261,13 +1261,6 @@ var (
 			Owner:        grafanaObservabilityTracesAndProfilingSquad,
 			FrontendOnly: true,
 		},
-		{
-			Name:        "jaegerBackendMigration",
-			Description: "Enables querying the Jaeger data source without the proxy",
-			Stage:       FeatureStageGeneralAvailability,
-			Owner:       grafanaOSSBigTent,
-			Expression:  "true",
-		},
 		{
 			Name:         "alertingUIOptimizeReducer",
 			Description:  "Enables removing the reducer from the alerting UI when creating a new alert rule and using instant query",

pkg/services/featuremgmt/toggles_gen.csv

@@ -165,7 +165,6 @@ prometheusSpecialCharsInLabelValues,experimental,@grafana/oss-big-tent,false,fal
 enableExtensionsAdminPage,experimental,@grafana/plugins-platform-backend,false,true,false
 enableSCIM,preview,@grafana/identity-access-team,false,false,false
 crashDetection,experimental,@grafana/observability-traces-and-profiling,false,false,true
-jaegerBackendMigration,GA,@grafana/oss-big-tent,false,false,false
 alertingUIOptimizeReducer,GA,@grafana/alerting-squad,false,false,true
 azureMonitorEnableUserAuth,GA,@grafana/partner-datasources,false,false,false
 alertingNotificationsStepMode,GA,@grafana/alerting-squad,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -671,10 +671,6 @@ const (
 	// Enables browser crash detection reporting to Faro.
 	FlagCrashDetection = "crashDetection"
 
-	// FlagJaegerBackendMigration
-	// Enables querying the Jaeger data source without the proxy
-	FlagJaegerBackendMigration = "jaegerBackendMigration"
-
 	// FlagAlertingUIOptimizeReducer
 	// Enables removing the reducer from the alerting UI when creating a new alert rule and using instant query
 	FlagAlertingUIOptimizeReducer = "alertingUIOptimizeReducer"

pkg/services/featuremgmt/toggles_gen.json

@@ -1542,6 +1542,7 @@
         "name": "jaegerBackendMigration",
         "resourceVersion": "1751465665226",
         "creationTimestamp": "2024-11-15T14:40:20Z",
+        "deletionTimestamp": "2025-07-07T14:12:35Z",
         "annotations": {
           "grafana.app/updatedTimestamp": "2025-07-02 14:14:25.226989 +0000 UTC"
         }