Resolves Issue 878 - Restriction removed that required at least one user account to remain in a domain. Superadmin/Admin still not allowed to delete their own account (for obvious reasons).

core/users/users.php

@@ -186,7 +186,7 @@ $field_value = $_REQUEST["field_value"];
 					echo "<a href='usersupdate.php?id=".$row['user_uuid']."' alt='".$text['button-edit']."'>$v_link_label_edit</a>";
 				}
 				if (permission_exists('user_delete')) {
-					if ($_SESSION["user"]["user_uuid"] != $row['user_uuid'] && $result_count > 1) {
+					if ($_SESSION["user"]["user_uuid"] != $row['user_uuid']) {
 						echo "<a href='userdelete.php?id=".$row['user_uuid']."' alt='".$text['button-delete']."' onclick=\"return confirm('".$text['confirm-delete']."')\">".$v_link_label_delete."</a>";
 					}
 					else {