From dea602835a86e9b1b762de89c81f6ba490cd8a88 Mon Sep 17 00:00:00 2001
From: Ivan Goncharov <ivan.goncharov.ua@gmail.com>
Date: Tue, 30 Jul 2019 13:28:24 +0300
Subject: [PATCH] Remove useless invariant since 'serialize' is always exist
 (#2063)

---
 src/execution/execute.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/execution/execute.js b/src/execution/execute.js
index 79a3b77062..ad630f8aac 100644
--- a/src/execution/execute.js
+++ b/src/execution/execute.js
@@ -929,7 +929,6 @@ function completeListValue(
  * null if serialization is not possible.
  */
 function completeLeafValue(returnType: GraphQLLeafType, result: mixed): mixed {
-  invariant(returnType.serialize, 'Missing serialize method on type');
   const serializedResult = returnType.serialize(result);
   if (isInvalid(serializedResult)) {
     throw new Error(