Migrate User.ClearAllCustomRoleAssignments to sync by default (#11506)

app/permissions.go

@@ -28,8 +28,8 @@ func (a *App) ResetPermissionsSystem() *model.AppError {
 	}
 
 	// Reset all Custom Role assignments to Users.
-	if result := <-a.Srv.Store.User().ClearAllCustomRoleAssignments(); result.Err != nil {
-		return result.Err
+	if err := a.Srv.Store.User().ClearAllCustomRoleAssignments(); err != nil {
+		return err
 	}
 
 	// Reset all Custom Role assignments to TeamMembers.