RBAC: Remove builtin role code (#53767)

* remove rbacBuiltInRoleAssignmentEnabled from frontendsettings

* RBAC: Remove RBACBuiltInRoleAssignmentEnabled

* RBAC: Remove code for builtin role

* RolePicker: Remove unused prop

* RolePicker: Rename builtinRole to basicRole

* RolePicker: Rename onBuiltinRoleChange to onBasicRoleChange

* RolePicker: Rename properties

pkg/services/accesscontrol/accesscontrol.go

@@ -272,16 +272,9 @@ func IsDisabled(cfg *setting.Cfg) bool {
 }
 
 // GetOrgRoles returns legacy org roles for a user
-func GetOrgRoles(cfg *setting.Cfg, user *user.SignedInUser) []string {
+func GetOrgRoles(user *user.SignedInUser) []string {
 	roles := []string{string(user.OrgRole)}
 
-	// With built-in role simplifying, inheritance is performed upon role registration.
-	if cfg.RBACBuiltInRoleAssignmentEnabled {
-		for _, br := range user.OrgRole.Children() {
-			roles = append(roles, string(br))
-		}
-	}
-
 	if user.IsGrafanaAdmin {
 		roles = append(roles, RoleGrafanaAdmin)
 	}