Remove LDAP mail attribute as a requirement for registering an account

test/web/oauth/ldap_authorization_test.exs

@@ -72,9 +72,7 @@ defmodule Pleroma.Web.OAuth.LDAPAuthorizationTest do
          equalityMatch: fn _type, _value -> :ok end,
          wholeSubtree: fn -> :ok end,
          search: fn _connection, _options ->
-           {:ok,
-            {:eldap_search_result, [{:eldap_entry, '', [{'mail', [to_charlist(user.email)]}]}],
-             []}}
+           {:ok, {:eldap_search_result, [{:eldap_entry, '', []}], []}}
          end,
          close: fn _connection ->
            send(self(), :close_connection)