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/featuremgmt/service_test.go

@@ -1,62 +0,0 @@
-package featuremgmt
-
-import (
-	"testing"
-
-	"github.com/grafana/grafana/pkg/models"
-	"github.com/grafana/grafana/pkg/setting"
-	"github.com/stretchr/testify/require"
-)
-
-func TestFeatureService(t *testing.T) {
-	license := stubLicenseServier{
-		flags: map[string]bool{
-			"some.feature": true,
-			"another":      true,
-		},
-	}
-	cfg := setting.NewCfg()
-	mgmt, err := ProvideManagerService(cfg, license)
-	require.NoError(t, err)
-	require.NotNil(t, mgmt)
-
-	require.False(t, license.FeatureEnabled("test"))
-	require.True(t, license.FeatureEnabled("some.feature"))
-	require.True(t, mgmt.IsEnabled("some.feature"))
-}
-
-var (
-	_ models.Licensing = (*stubLicenseServier)(nil)
-)
-
-type stubLicenseServier struct {
-	flags map[string]bool
-}
-
-func (s stubLicenseServier) Expiry() int64 {
-	return 100
-}
-
-func (s stubLicenseServier) Edition() string {
-	return "test"
-}
-
-func (s stubLicenseServier) ContentDeliveryPrefix() string {
-	return ""
-}
-
-func (s stubLicenseServier) LicenseURL(showAdminLicensingPage bool) string {
-	return "http://??"
-}
-
-func (s stubLicenseServier) StateInfo() string {
-	return "ok"
-}
-
-func (s stubLicenseServier) EnabledFeatures() map[string]bool {
-	return s.flags
-}
-
-func (s stubLicenseServier) FeatureEnabled(feature string) bool {
-	return s.flags[feature]
-}