Simplify imports in react reconciler (#13718)

* Simplify imports in ReactChildFiber
* Import type first in ReactCurrentFiber
* Simplify imports in ReactFiberBeginWork
* Simplify imports in ReactFiberScheduler
* Simplify import in ReactFiberTreeReflection
* Simplify import in ReactFiberUnwindWork
* Remove repeated import
* Fix imports from ReactFiberExpirationTime
* Master imports in ReactFiberBeginWork

Author: mmarkelov

packages/react-reconciler/src/ReactChildFiber.js

@@ -9,8 +9,8 @@
 
 import type {ReactElement} from 'shared/ReactElementType';
 import type {ReactPortal} from 'shared/ReactTypes';
-import type {Fiber} from 'react-reconciler/src/ReactFiber';
-import type {ExpirationTime} from 'react-reconciler/src/ReactFiberExpirationTime';
+import type {Fiber} from './ReactFiber';
+import type {ExpirationTime} from './ReactFiberExpirationTime';
 
 import getComponentName from 'shared/getComponentName';
 import {Placement, Deletion} from 'shared/ReactSideEffectTags';

packages/react-reconciler/src/ReactCurrentFiber.js

@@ -7,6 +7,8 @@
  * @flow
  */
 
+import type {Fiber} from './ReactFiber';
+
 import ReactSharedInternals from 'shared/ReactSharedInternals';
 import {
   IndeterminateComponent,
@@ -21,8 +23,6 @@ import getComponentName from 'shared/getComponentName';
 
 const ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
 
-import type {Fiber} from './ReactFiber';
-
 type LifeCyclePhase = 'render' | 'getChildContext';
 
 function describeFiber(fiber: Fiber): string {

packages/react-reconciler/src/ReactFiberBeginWork.js

@@ -8,7 +8,7 @@
  */
 
 import type {ReactProviderType, ReactContext} from 'shared/ReactTypes';
-import type {Fiber} from 'react-reconciler/src/ReactFiber';
+import type {Fiber} from './ReactFiber';
 import type {FiberRoot} from './ReactFiberRoot';
 import type {ExpirationTime} from './ReactFiberExpirationTime';
 import type {SuspenseState} from './ReactFiberSuspenseComponent';

packages/react-reconciler/src/ReactFiberScheduler.js

@@ -78,6 +78,9 @@ import {
   noTimeout,
   prepareForCommit,
   resetAfterCommit,
+  scheduleTimeout,
+  cancelTimeout,
+  noTimeout,
 } from './ReactFiberHostConfig';
 import {
   markPendingPriorityLevel,

packages/react-reconciler/src/ReactFiberTreeReflection.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {Fiber} from 'react-reconciler/src/ReactFiber';
+import type {Fiber} from './ReactFiber';
 
 import invariant from 'shared/invariant';
 import warningWithoutStack from 'shared/warningWithoutStack';

packages/react-reconciler/src/ReactFiberUnwindWork.js

@@ -61,11 +61,12 @@ import {
   isAlreadyFailedLegacyErrorBoundary,
   retrySuspendedRoot,
 } from './ReactFiberScheduler';
-import {NoWork, Sync} from './ReactFiberExpirationTime';
 
 import invariant from 'shared/invariant';
 import maxSigned31BitInt from './maxSigned31BitInt';
 import {
+  NoWork,
+  Sync,
   expirationTimeToMs,
   LOW_PRIORITY_EXPIRATION,
 } from './ReactFiberExpirationTime';