Removed unnecessary comma that made it impossible to sign in via cookie

lib/two_factor_authentication/hooks/two_factor_authenticatable.rb

@@ -1,6 +1,6 @@
 Warden::Manager.after_authentication do |user, auth, options|
   if auth.env["action_dispatch.cookies"]
-    expected_cookie_value = "#{user.class}-#{user.public_send(Devise.second_factor_resource_id)}",
+    expected_cookie_value = "#{user.class}-#{user.public_send(Devise.second_factor_resource_id)}"
     actual_cookie_value = auth.env["action_dispatch.cookies"].signed[TwoFactorAuthentication::REMEMBER_TFA_COOKIE_NAME]
     bypass_by_cookie = actual_cookie_value == expected_cookie_value
   end