Remove outdated test

spec/models/lettings_log_spec.rb

@@ -329,17 +329,6 @@ RSpec.describe LettingsLog do
           .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
       end
 
-      context "when the local authority lookup times out" do
-        before do
-          allow(Timeout).to receive(:timeout).and_raise(Timeout::Error)
-        end
-
-        it "logs a warning" do
-          expect(Rails.logger).to receive(:warn).with("Postcodes.io lookup timed out")
-          address_lettings_log.update!({ postcode_known: 1, postcode_full: "M1 1AD" })
-        end
-      end
-
       it "correctly resets all fields if property postcode not known" do
         address_lettings_log.update!({ postcode_known: 0 })