[cleanup] remove unused values from ReactFeatureFlags.www-dynamic

These values are never imported into `ReactFeatureFlags.www.js`, so they're never used:
- allowConcurrentByDefault
- consoleManagedByDevToolsDuringStrictMode

These values are never set in the WWW module, so they're always `undefined` on www:
- createRootStrictEffectsByDefault
- deferRenderPhaseUpdateToNextBatch
- enableClientRenderFallbackOnTextMismatch

packages/shared/forks/ReactFeatureFlags.www-dynamic.js

@@ -24,9 +24,7 @@ export const enableProfilerNestedUpdateScheduledHook = __VARIANT__;
 export const disableSchedulerTimeoutInWorkLoop = __VARIANT__;
 export const enableLazyContextPropagation = __VARIANT__;
 export const enableSyncDefaultUpdates = __VARIANT__;
-export const consoleManagedByDevToolsDuringStrictMode = __VARIANT__;
 export const enableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay = __VARIANT__;
-export const enableClientRenderFallbackOnTextMismatch = __VARIANT__;
 export const enableTransitionTracing = __VARIANT__;
 // Enable this flag to help with concurrent mode debugging.
 // It logs information to the console about React scheduling, rendering, and commit phases.
@@ -36,16 +34,6 @@ export const enableDebugTracing = __EXPERIMENTAL__;
 
 export const enableSchedulingProfiler = __VARIANT__;
 
-// This only has an effect in the new reconciler. But also, the new reconciler
-// is only enabled when __VARIANT__ is true. So this is set to the opposite of
-// __VARIANT__ so that it's `false` when running against the new reconciler.
-// Ideally we would test both against the new reconciler, but until then, we
-// should test the value that is used in www. Which is `false`.
-//
-// Once Lanes has landed in both reconciler forks, we'll get coverage of
-// both branches.
-export const deferRenderPhaseUpdateToNextBatch = !__VARIANT__;
-
 // These are already tested in both modes using the build type dimension,
 // so we don't need to use __VARIANT__ to get extra coverage.
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
@@ -56,7 +44,5 @@ export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
 export const enableTrustedTypesIntegration = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
 export const disableNativeComponentFrames = false;
-export const createRootStrictEffectsByDefault = false;
-export const allowConcurrentByDefault = true;
 // You probably *don't* want to add more hardcoded ones.
 // Instead, try to add them above with the __VARIANT__ value.

packages/shared/forks/ReactFeatureFlags.www.js

@@ -22,17 +22,14 @@ export const {
   replayFailedUnitOfWorkWithInvokeGuardedCallback,
   enableFilterEmptyStringAttributesDOM,
   enableLegacyFBSupport,
-  deferRenderPhaseUpdateToNextBatch,
   enableDebugTracing,
   skipUnmountedBoundaries,
-  createRootStrictEffectsByDefault,
   enableUseRefAccessWarning,
   disableNativeComponentFrames,
   disableSchedulerTimeoutInWorkLoop,
   enableLazyContextPropagation,
   enableSyncDefaultUpdates,
   enableCapturePhaseSelectiveHydrationWithoutDiscreteEventReplay,
-  enableClientRenderFallbackOnTextMismatch,
   enableTransitionTracing,
 } = dynamicFeatureFlags;
 
@@ -47,6 +44,8 @@ export const enableProfilerNestedUpdateScheduledHook: boolean =
   __PROFILE__ && dynamicFeatureFlags.enableProfilerNestedUpdateScheduledHook;
 export const enableUpdaterTracking = __PROFILE__;
 
+export const createRootStrictEffectsByDefault = false;
+export const deferRenderPhaseUpdateToNextBatch = false;
 export const enableSuspenseAvoidThisFallback = true;
 export const enableSuspenseAvoidThisFallbackFizz = false;
 export const enableCPUSuspense = true;
@@ -55,6 +54,7 @@ export const enableUseHook = true;
 export const enableUseMemoCacheHook = true;
 export const enableUseEventHook = true;
 export const enableHostSingletons = true;
+export const enableClientRenderFallbackOnTextMismatch = false;
 
 // Logs additional User Timing API marks for use with an experimental profiling tool.
 export const enableSchedulingProfiler: boolean =