Alerting: remove feature toggle for provisioning API (#50167)

* Alerting: remove feature toggle for provisioning API

* remove missed code parts

* remove unused import

* remove empty line

* mark routes as stable

pkg/services/ngalert/api/api.go

@@ -11,7 +11,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
 	"github.com/grafana/grafana/pkg/services/datasourceproxy"
 	"github.com/grafana/grafana/pkg/services/datasources"
-	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	apimodels "github.com/grafana/grafana/pkg/services/ngalert/api/tooling/definitions"
 	"github.com/grafana/grafana/pkg/services/ngalert/eval"
 	"github.com/grafana/grafana/pkg/services/ngalert/metrics"
@@ -136,14 +135,12 @@ func (api *API) RegisterAPIEndpoints(m *metrics.API) {
 		},
 	), m)
 
-	if api.Cfg.IsFeatureToggleEnabled(featuremgmt.FlagAlertProvisioning) {
-		api.RegisterProvisioningApiEndpoints(NewForkedProvisioningApi(&ProvisioningSrv{
-			log:                 logger,
-			policies:            api.Policies,
-			contactPointService: api.ContactPointService,
-			templates:           api.Templates,
-			muteTimings:         api.MuteTimings,
-			alertRules:          api.AlertRules,
-		}), m)
-	}
+	api.RegisterProvisioningApiEndpoints(NewForkedProvisioningApi(&ProvisioningSrv{
+		log:                 logger,
+		policies:            api.Policies,
+		contactPointService: api.ContactPointService,
+		templates:           api.Templates,
+		muteTimings:         api.MuteTimings,
+		alertRules:          api.AlertRules,
+	}), m)
 }