Remove unused flag (#18132)

packages/react-reconciler/src/ReactFiberWorkLoop.js

@@ -28,7 +28,6 @@ import {
   warnAboutUnmockedScheduler,
   flushSuspenseFallbacksInTests,
   disableSchedulerTimeoutBasedOnReactExpirationTime,
-  enableTrainModelFix,
 } from 'shared/ReactFeatureFlags';
 import ReactSharedInternals from 'shared/ReactSharedInternals';
 import invariant from 'shared/invariant';
@@ -548,11 +547,7 @@ function getNextRootExpirationTimeToWorkOn(root: FiberRoot): ExpirationTime {
     lastPingedTime > nextKnownPendingLevel
       ? lastPingedTime
       : nextKnownPendingLevel;
-  if (
-    enableTrainModelFix &&
-    nextLevel <= Idle &&
-    firstPendingTime !== nextLevel
-  ) {
+  if (nextLevel <= Idle && firstPendingTime !== nextLevel) {
     // Don't work on Idle/Never priority unless everything else is committed.
     return NoWork;
   }
@@ -2478,12 +2473,6 @@ export function pingSuspendedRoot(
   // Mark the time at which this ping was scheduled.
   root.lastPingedTime = suspendedTime;
 
-  if (!enableTrainModelFix && root.finishedExpirationTime === suspendedTime) {
-    // If there's a pending fallback waiting to commit, throw it away.
-    root.finishedExpirationTime = NoWork;
-    root.finishedWork = null;
-  }
-
   ensureRootIsScheduled(root);
   schedulePendingInteractions(root, suspendedTime);
 }

packages/shared/ReactFeatureFlags.js

@@ -81,8 +81,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 
-export const enableTrainModelFix = true;
-
 export const enableTrustedTypesIntegration = false;
 
 // Flag to turn event.target and event.currentTarget in ReactNative from a reactTag to a component instance

packages/shared/forks/ReactFeatureFlags.native-fb.js

@@ -41,7 +41,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableMapsAsChildren = false;

packages/shared/forks/ReactFeatureFlags.native-oss.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = false;

packages/shared/forks/ReactFeatureFlags.persistent.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = false;

packages/shared/forks/ReactFeatureFlags.test-renderer.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = false;

packages/shared/forks/ReactFeatureFlags.test-renderer.www.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = false;

packages/shared/forks/ReactFeatureFlags.testing.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = false;

packages/shared/forks/ReactFeatureFlags.testing.www.js

@@ -35,7 +35,6 @@ export const warnAboutDefaultPropsOnFunctionComponents = false;
 export const warnAboutStringRefs = false;
 export const disableLegacyContext = __EXPERIMENTAL__;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-export const enableTrainModelFix = true;
 export const enableTrustedTypesIntegration = false;
 export const enableNativeTargetAsInstance = false;
 export const disableTextareaChildren = __EXPERIMENTAL__;

packages/shared/forks/ReactFeatureFlags.www.js

@@ -43,8 +43,6 @@ export const disableLegacyContext = __EXPERIMENTAL__;
 export const warnAboutStringRefs = false;
 export const warnAboutDefaultPropsOnFunctionComponents = false;
 
-export const enableTrainModelFix = true;
-
 export const enableSuspenseServerRenderer = true;
 export const enableSelectiveHydration = true;