Eliminate legacy flow syntax in ReactNativeFeatureFlags.js (#57192)

SamChou19815 · meta-codesync[bot] · commit 066c0d8bd842 · 2026-06-12T15:13:57.000-07:00
Summary: Pull Request resolved: #57192 Changelog: [Internal] Reviewed By: panagosg7 Differential Revision: D108435552 fbshipit-source-id: b9228cb948590d4981e0ad0b798354b611751bec
diff --git a/.flowconfig b/.flowconfig
@@ -67,7 +67,6 @@ react.runtime=automatic
 
 experimental.deprecated_utilities.excludes=<PROJECT_ROOT>/packages/react-native/Libraries/Renderer/shims/ReactNativeTypes.js
 experimental.deprecated_utilities.excludes=<PROJECT_ROOT>/packages/react-native/Libraries/Renderer/shims/ReactNativeViewConfigRegistry.js
-experimental.deprecated_utilities.excludes=<PROJECT_ROOT>/packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js
 ban_spread_key_props=true
 
 [lints]
diff --git a/packages/react-native/scripts/featureflags/templates/js/ReactNativeFeatureFlags.js-template.js b/packages/react-native/scripts/featureflags/templates/js/ReactNativeFeatureFlags.js-template.js
@@ -35,7 +35,7 @@ import {
   setOverrides,
 } from './ReactNativeFeatureFlagsBase';
 
-export type ReactNativeFeatureFlagsJsOnly = $ReadOnly<{
+export type ReactNativeFeatureFlagsJsOnly = Readonly<{
 ${Object.entries(definitions.jsOnly)
   .map(
     ([flagName, flagConfig]) =>
@@ -46,7 +46,7 @@ ${Object.entries(definitions.jsOnly)
 
 export type ReactNativeFeatureFlagsJsOnlyOverrides = OverridesFor<ReactNativeFeatureFlagsJsOnly>;
 
-export type ReactNativeFeatureFlags = $ReadOnly<{
+export type ReactNativeFeatureFlags = Readonly<{
   ...ReactNativeFeatureFlagsJsOnly,
 ${Object.entries(definitions.common)
   .map(
diff --git a/packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js b/packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js
@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<d9146c8c9b0c602e4cedb99e6d91558e>>
+ * @generated SignedSource<<609451fd0a38e0f8eaf685e7cf534e27>>
  * @flow strict
  * @noformat
  */
@@ -27,7 +27,7 @@ import {
   setOverrides,
 } from './ReactNativeFeatureFlagsBase';
 
-export type ReactNativeFeatureFlagsJsOnly = $ReadOnly<{
+export type ReactNativeFeatureFlagsJsOnly = Readonly<{
   jsOnlyTestFlag: Getter<boolean>,
   animatedDeferStartOfTimingAnimations: Getter<boolean>,
   animatedShouldDebounceQueueFlush: Getter<boolean>,
@@ -46,7 +46,7 @@ export type ReactNativeFeatureFlagsJsOnly = $ReadOnly<{
 
 export type ReactNativeFeatureFlagsJsOnlyOverrides = OverridesFor<ReactNativeFeatureFlagsJsOnly>;
 
-export type ReactNativeFeatureFlags = $ReadOnly<{
+export type ReactNativeFeatureFlags = Readonly<{
   ...ReactNativeFeatureFlagsJsOnly,
   commonTestFlag: Getter<boolean>,
   commonTestFlagWithoutNativeImplementation: Getter<boolean>,
