Chore: remove IsDisabled method for access control (#74340)

remove IsDisabled method for access control, clean up tests

pkg/setting/setting.go

@@ -536,7 +536,6 @@ type Cfg struct {
 	OAuth2ServerAccessTokenLifespan       time.Duration
 
 	// Access Control
-	RBACEnabled         bool
 	RBACPermissionCache bool
 	// Enable Permission validation during role creation and provisioning
 	RBACPermissionValidationEnabled bool
@@ -970,11 +969,10 @@ var skipStaticRootValidation = false
 
 func NewCfg() *Cfg {
 	return &Cfg{
-		Target:      []string{"all"},
-		Logger:      log.New("settings"),
-		Raw:         ini.Empty(),
-		Azure:       &azsettings.AzureSettings{},
-		RBACEnabled: true,
+		Target: []string{"all"},
+		Logger: log.New("settings"),
+		Raw:    ini.Empty(),
+		Azure:  &azsettings.AzureSettings{},
 	}
 }
 
@@ -1659,7 +1657,6 @@ func readAuthSettings(iniFile *ini.File, cfg *Cfg) (err error) {
 
 func readAccessControlSettings(iniFile *ini.File, cfg *Cfg) {
 	rbac := iniFile.Section("rbac")
-	cfg.RBACEnabled = true
 	cfg.RBACPermissionCache = rbac.Key("permission_cache").MustBool(true)
 	cfg.RBACPermissionValidationEnabled = rbac.Key("permission_validation_enabled").MustBool(false)
 	cfg.RBACResetBasicRoles = rbac.Key("reset_basic_roles").MustBool(false)