[cleanup] remove old feature flag warnAboutDeprecatedLifecycles (#25978)

This feature flag was always set to true, we can easily clean it up.

Author: kassens

packages/react-reconciler/src/ReactFiberClassComponent.js

@@ -23,7 +23,6 @@ import {
   disableLegacyContext,
   enableDebugTracing,
   enableSchedulingProfiler,
-  warnAboutDeprecatedLifecycles,
   enableLazyContextPropagation,
 } from 'shared/ReactFeatureFlags';
 import ReactStrictModeWarnings from './ReactStrictModeWarnings';
@@ -868,12 +867,10 @@ function mountClassInstance(
       );
     }
 
-    if (warnAboutDeprecatedLifecycles) {
-      ReactStrictModeWarnings.recordUnsafeLifecycleWarnings(
-        workInProgress,
-        instance,
-      );
-    }
+    ReactStrictModeWarnings.recordUnsafeLifecycleWarnings(
+      workInProgress,
+      instance,
+    );
   }
 
   instance.state = workInProgress.memoizedState;

packages/react-reconciler/src/ReactFiberWorkLoop.js

@@ -24,7 +24,6 @@ import type {
 import type {OffscreenInstance} from './ReactFiberOffscreenComponent';
 
 import {
-  warnAboutDeprecatedLifecycles,
   replayFailedUnitOfWorkWithInvokeGuardedCallback,
   enableCreateEventHandleAPI,
   enableProfilerTimer,
@@ -3534,10 +3533,7 @@ export function throwIfInfiniteUpdateLoopDetected() {
 function flushRenderPhaseStrictModeWarningsInDEV() {
   if (__DEV__) {
     ReactStrictModeWarnings.flushLegacyContextWarning();
-
-    if (warnAboutDeprecatedLifecycles) {
-      ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings();
-    }
+    ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings();
   }
 }
 

packages/react-server/src/ReactFizzClassComponent.js

@@ -10,10 +10,7 @@
 import {emptyContextObject} from './ReactFizzContext';
 import {readContext} from './ReactFizzNewContext';
 
-import {
-  disableLegacyContext,
-  warnAboutDeprecatedLifecycles,
-} from 'shared/ReactFeatureFlags';
+import {disableLegacyContext} from 'shared/ReactFeatureFlags';
 import {get as getInstance, set as setInstance} from 'shared/ReactInstanceMap';
 import getComponentNameFromType from 'shared/getComponentNameFromType';
 import {REACT_CONTEXT_TYPE, REACT_PROVIDER_TYPE} from 'shared/ReactSymbols';
@@ -539,10 +536,7 @@ function callComponentWillMount(type: any, instance: any) {
 
   if (typeof instance.componentWillMount === 'function') {
     if (__DEV__) {
-      if (
-        warnAboutDeprecatedLifecycles &&
-        instance.componentWillMount.__suppressDeprecationWarning !== true
-      ) {
+      if (instance.componentWillMount.__suppressDeprecationWarning !== true) {
         const componentName = getComponentNameFromType(type) || 'Unknown';
 
         if (!didWarnAboutDeprecatedWillMount[componentName]) {

packages/shared/ReactFeatureFlags.js

@@ -13,7 +13,6 @@
 // Flags that can likely be deleted or landed without consequences
 // -----------------------------------------------------------------------------
 
-export const warnAboutDeprecatedLifecycles = true;
 export const enableComponentStackLocations = true;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 

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

@@ -37,7 +37,6 @@ export const disableJavaScriptURLs = false;
 export const disableCommentsAsDOMContainers = true;
 export const disableInputAttributeSyncing = false;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
-export const warnAboutDeprecatedLifecycles = true;
 export const enableScopeAPI = false;
 export const enableCreateEventHandleAPI = false;
 export const enableSuspenseCallback = false;

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

@@ -14,7 +14,6 @@ export const debugRenderPhaseSideEffectsForStrictMode = false;
 export const enableDebugTracing = false;
 export const enableSchedulingProfiler = false;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
-export const warnAboutDeprecatedLifecycles = true;
 export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;
 export const enableProfilerNestedUpdatePhase = __PROFILE__;

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

@@ -13,7 +13,6 @@ import typeof * as ExportsType from './ReactFeatureFlags.test-renderer';
 export const debugRenderPhaseSideEffectsForStrictMode = false;
 export const enableDebugTracing = false;
 export const enableSchedulingProfiler = false;
-export const warnAboutDeprecatedLifecycles = true;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
 export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;

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

@@ -13,7 +13,6 @@ import typeof * as ExportsType from './ReactFeatureFlags.test-renderer';
 export const debugRenderPhaseSideEffectsForStrictMode = false;
 export const enableDebugTracing = false;
 export const enableSchedulingProfiler = false;
-export const warnAboutDeprecatedLifecycles = true;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
 export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;

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

@@ -13,7 +13,6 @@ import typeof * as ExportsType from './ReactFeatureFlags.test-renderer.www';
 export const debugRenderPhaseSideEffectsForStrictMode = false;
 export const enableDebugTracing = false;
 export const enableSchedulingProfiler = false;
-export const warnAboutDeprecatedLifecycles = true;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
 export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;

packages/shared/forks/ReactFeatureFlags.testing.js

@@ -13,7 +13,6 @@ import typeof * as ExportsType from './ReactFeatureFlags.testing';
 export const debugRenderPhaseSideEffectsForStrictMode = false;
 export const enableDebugTracing = false;
 export const enableSchedulingProfiler = __PROFILE__;
-export const warnAboutDeprecatedLifecycles = true;
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
 export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;