Restore useless changes

test/checkouts_test.rb

@@ -56,7 +56,7 @@ class CheckoutsTest < Test::Unit::TestCase
 
     fake "checkouts/#{@expected_checkout_id}/payments", method: :get, status: 202, body: load_fixture('payments')
 
-    assert_equal 10.00, checkout.payments.first.attributes['amount']
+    assert_equal 10.00, checkout.payments.first.amount
   end
 
   test ":shipping_rates returns shipping rates for a checkout" do

test/fixtures/payment.json

@@ -1,6 +1,5 @@
 {
   "payment" : {
-    "id": "east-44a400ef20b36e38f10b882cb7260796",
     "amount": 10.00,
     "session_id": "east-44a400ef20b36e38f10b882cb7260796",
     "unique_token": "my-client-generated-idempotency-token"

test/fixtures/payments.json

@@ -1,7 +1,6 @@
 {
   "payments" : [
     {
-      "id": "east-44a400ef20b36e38f10b882cb7260796",
       "amount": 10.00,
       "session_id": "east-44a400ef20b36e38f10b882cb7260796",
       "unique_token": "my-client-generated-idempotency-token"