test(backend): fix legacy notifier test assert

We can't refute something right after asserting it before, unfortunately

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

test/service/workers/legacy_notifier_builder_test.exs

@@ -427,7 +427,8 @@ defmodule Mobilizon.Service.Workers.LegacyNotifierBuilderTest do
 
       assert_email_sending(%Swoosh.Email{to: [{"", "anon@mou.se"}]}, 10_000)
       refute_email_sent(%Swoosh.Email{to: [{"", "user2@do.main"}]})
-      refute_email_sent(%Swoosh.Email{to: [{"", "anon@mou.se"}]})
+      # Because of timeouts, can't do that currently
+      # refute_email_sent(%Swoosh.Email{to: [{"", "anon@mou.se"}]})
     end
   end
 end