FeatureFlags: Revert managing feature flags outside of settings.Cfg (#44382)

* Revert "FeatureToggles: register all enterprise feature toggles (#44336)"

This reverts commit f53b3fb007.

* Revert "FeatureFlags: manage feature flags outside of settings.Cfg (#43692)"

This reverts commit f94c0decbd.

pkg/services/serviceaccounts/api/api.go

@@ -13,8 +13,8 @@ import (
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
 	acmiddleware "github.com/grafana/grafana/pkg/services/accesscontrol/middleware"
-	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/serviceaccounts"
+	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/web"
 )
 
@@ -40,9 +40,9 @@ func NewServiceAccountsAPI(
 }
 
 func (api *ServiceAccountsAPI) RegisterAPIEndpoints(
-	features *featuremgmt.FeatureToggles,
+	cfg *setting.Cfg,
 ) {
-	if !features.IsServiceAccountsEnabled() {
+	if !cfg.FeatureToggles["service-accounts"] {
 		return
 	}