diff --git a/api/http/rbacutils/rbac_utils.go b/api/http/rbacutils/rbac_utils.go
deleted file mode 100644
index 38c142aea..000000000
--- a/api/http/rbacutils/rbac_utils.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package rbacutils
-
-import (
-	"fmt"
-
-	portainer "github.com/portainer/portainer/api"
-	"github.com/portainer/portainer/api/dataservices"
-	"github.com/portainer/portainer/api/kubernetes/cli"
-)
-
-// IsAdmin checks if user is a Portainer Admin based on the user's access policies
-// if the user is not in the UserAccessPolicies map, then the user is an admin
-// otherwise, the user defaults to a standard user in CE
-// for non-admin users, allowed namespaces will be returned
-func IsAdmin(user *portainer.User, endpoint *portainer.Endpoint, dataStore dataservices.DataStore, clientFactory *cli.ClientFactory) (bool, []string, error) {
-	if user == nil {
-		return false, nil, fmt.Errorf("an error occurred during the IsAdmin operation, user is nil. Unable to check if user is an admin")
-	}
-
-	// use constants
-	if user.Role != 1 {
-		nonAdminNamespaces, err := cli.GetNonAdminNamespaces(int(user.ID), endpoint, clientFactory)
-		if err != nil {
-			return false, nil, fmt.Errorf("an error occurred during the IsAdmin operation, unable to retrieve non-admin namespaces. Error: %v", err)
-		}
-		return false, nonAdminNamespaces, nil
-	}
-
-	return true, nil, nil
-}