Remove unused argument from finishConcurrentRender (facebook#19689)

Author: inottn

packages/react-reconciler/src/ReactFiberWorkLoop.new.js

@@ -859,7 +859,7 @@ function performConcurrentWorkOnRoot(root) {
     const finishedWork: Fiber = (root.current.alternate: any);
     root.finishedWork = finishedWork;
     root.finishedLanes = lanes;
-    finishConcurrentRender(root, finishedWork, exitStatus, lanes);
+    finishConcurrentRender(root, exitStatus, lanes);
   }
 
   ensureRootIsScheduled(root, now());
@@ -871,7 +871,7 @@ function performConcurrentWorkOnRoot(root) {
   return null;
 }
 
-function finishConcurrentRender(root, finishedWork, exitStatus, lanes) {
+function finishConcurrentRender(root, exitStatus, lanes) {
   switch (exitStatus) {
     case RootIncomplete:
     case RootFatalErrored: {

packages/react-reconciler/src/ReactFiberWorkLoop.old.js

@@ -847,7 +847,7 @@ function performConcurrentWorkOnRoot(root) {
     const finishedWork: Fiber = (root.current.alternate: any);
     root.finishedWork = finishedWork;
     root.finishedLanes = lanes;
-    finishConcurrentRender(root, finishedWork, exitStatus, lanes);
+    finishConcurrentRender(root, exitStatus, lanes);
   }
 
   ensureRootIsScheduled(root, now());
@@ -859,7 +859,7 @@ function performConcurrentWorkOnRoot(root) {
   return null;
 }
 
-function finishConcurrentRender(root, finishedWork, exitStatus, lanes) {
+function finishConcurrentRender(root, exitStatus, lanes) {
   switch (exitStatus) {
     case RootIncomplete:
     case RootFatalErrored: {