From b680174841bf13b233fef74cd600cf76ba5faf99 Mon Sep 17 00:00:00 2001
From: Andrew Clark <git@andrewclark.io>
Date: Wed, 15 Apr 2020 07:47:37 -0700
Subject: [PATCH] Delete mutableSourceFirstPendingUpdateTime (#18613)

---
 packages/react-reconciler/src/ReactFiberRoot.new.js | 1 -
 packages/react-reconciler/src/ReactFiberRoot.old.js | 1 -
 2 files changed, 2 deletions(-)

diff --git a/packages/react-reconciler/src/ReactFiberRoot.new.js b/packages/react-reconciler/src/ReactFiberRoot.new.js
index 1b338f12e3..a010f22bb2 100644
--- a/packages/react-reconciler/src/ReactFiberRoot.new.js
+++ b/packages/react-reconciler/src/ReactFiberRoot.new.js
@@ -44,7 +44,6 @@ function FiberRootNode(containerInfo, tag, hydrate) {
   this.nextKnownPendingLevel = NoWork;
   this.lastPingedTime = NoWork;
   this.lastExpiredTime = NoWork;
-  this.mutableSourceFirstPendingUpdateTime = NoWork;
   this.mutableSourceLastPendingUpdateTime = NoWork;
 
   if (enableSchedulerTracing) {
diff --git a/packages/react-reconciler/src/ReactFiberRoot.old.js b/packages/react-reconciler/src/ReactFiberRoot.old.js
index 10e0180bf6..83ecdd79ad 100644
--- a/packages/react-reconciler/src/ReactFiberRoot.old.js
+++ b/packages/react-reconciler/src/ReactFiberRoot.old.js
@@ -44,7 +44,6 @@ function FiberRootNode(containerInfo, tag, hydrate) {
   this.nextKnownPendingLevel = NoWork;
   this.lastPingedTime = NoWork;
   this.lastExpiredTime = NoWork;
-  this.mutableSourceFirstPendingUpdateTime = NoWork;
   this.mutableSourceLastPendingUpdateTime = NoWork;
 
   if (enableSchedulerTracing) {