Remove createRootStrictEffectsByDefault flag (#28102)

There's no need to separate strict mode from strict effects mode any
more.

I didn't clean up the `StrictEffectMode` fiber flag, because it's used
to prevent strict effects in legacy mode. I could replace those checks
with `LegacyMode` checks, but when we remove legacy mode, we can remove
that flag and condense them into one StrictMode flag away.

DiffTrain build for commit 3d1da1f.

Author: rickhanlonii

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<bd897fcea644b2a95f4293822e1f08be>>
+ * @generated SignedSource<<fdc597b6fd2e169218abbcc3fbb6bc8c>>
  */
 
 "use strict";
@@ -142,7 +142,6 @@ if (__DEV__) {
     var enableProfilerTimer = true;
     var enableProfilerCommitHooks = true;
     var enableProfilerNestedUpdatePhase = true;
-    var createRootStrictEffectsByDefault = false;
     var syncLaneExpirationMs = 250;
     var transitionLaneExpirationMs = 5000;
     var enableLazyContextPropagation = false;
@@ -25204,7 +25203,7 @@ if (__DEV__) {
       if (tag === ConcurrentRoot) {
         mode = ConcurrentMode;
 
-        if (isStrictMode === true || createRootStrictEffectsByDefault) {
+        if (isStrictMode === true) {
           mode |= StrictLegacyMode | StrictEffectsMode;
         }
 
@@ -25623,7 +25622,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "18.3.0-canary-4dd475c97-20240201";
+    var ReactVersion = "18.3.0-canary-3d1da1f9a-20240201";
 
     // Might add PROFILE later.
 

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-prod.js

@@ -9149,7 +9149,7 @@ var devToolsConfig$jscomp$inline_1031 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-4dd475c97-20240201",
+  version: "18.3.0-canary-3d1da1f9a-20240201",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1207 = {
@@ -9180,7 +9180,7 @@ var internals$jscomp$inline_1207 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-4dd475c97-20240201"
+  reconcilerVersion: "18.3.0-canary-3d1da1f9a-20240201"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1208 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-profiling.js

@@ -9577,7 +9577,7 @@ var devToolsConfig$jscomp$inline_1073 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-4dd475c97-20240201",
+  version: "18.3.0-canary-3d1da1f9a-20240201",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1248 = {
@@ -9608,7 +9608,7 @@ var internals$jscomp$inline_1248 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-4dd475c97-20240201"
+  reconcilerVersion: "18.3.0-canary-3d1da1f9a-20240201"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1249 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-dev.js

@@ -24,7 +24,7 @@ if (__DEV__) {
     ) {
       __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
     }
-    var ReactVersion = "18.3.0-canary-4dd475c97-20240201";
+    var ReactVersion = "18.3.0-canary-3d1da1f9a-20240201";
 
     // ATTENTION
     // When adding new symbols to this file,

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-prod.js

@@ -545,4 +545,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-4dd475c97-20240201";
+exports.version = "18.3.0-canary-3d1da1f9a-20240201";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-profiling.js

@@ -541,7 +541,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-4dd475c97-20240201";
+exports.version = "18.3.0-canary-3d1da1f9a-20240201";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/REVISION

@@ -1 +1 @@
-4dd475c97799f3fb83bdd2fff2d028e0e30041cf
+3d1da1f9ab7d54984c096e6a04c8729f3a50fd8a

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactFabric-dev.fb.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<b9de33ad77303e612467451dba484b4f>>
+ * @generated SignedSource<<23d1b7cce95eeba5b7251f184412d23c>>
  */
 
 "use strict";
@@ -3247,7 +3247,6 @@ to return true:wantsResponderID|                            |
     var enableProfilerNestedUpdatePhase = true;
     var syncLaneExpirationMs = 250;
     var transitionLaneExpirationMs = 5000;
-    var createRootStrictEffectsByDefault = false;
     var enableLazyContextPropagation = false;
     var enableAsyncActions = false;
 
@@ -27378,7 +27377,7 @@ to return true:wantsResponderID|                            |
       if (tag === ConcurrentRoot) {
         mode = ConcurrentMode;
 
-        if (isStrictMode === true || createRootStrictEffectsByDefault) {
+        if (isStrictMode === true) {
           mode |= StrictLegacyMode | StrictEffectsMode;
         }
 
@@ -27856,7 +27855,7 @@ to return true:wantsResponderID|                            |
       return root;
     }
 
-    var ReactVersion = "18.3.0-canary-a4243e8c";
+    var ReactVersion = "18.3.0-canary-e1f5390e";
 
     function createPortal$1(
       children,

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/implementations/ReactNativeRenderer-dev.fb.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<ba7079d4e2b3c30850f1187f2cda38c9>>
+ * @generated SignedSource<<901a1526ca77447e4134b09fdc38f5d6>>
  */
 
 "use strict";
@@ -2955,7 +2955,6 @@ to return true:wantsResponderID|                            |
     var enableProfilerNestedUpdatePhase = true;
     var syncLaneExpirationMs = 250;
     var transitionLaneExpirationMs = 5000;
-    var createRootStrictEffectsByDefault = false;
     var enableLazyContextPropagation = false;
     var enableAsyncActions = false;
 
@@ -27819,7 +27818,7 @@ to return true:wantsResponderID|                            |
       if (tag === ConcurrentRoot) {
         mode = ConcurrentMode;
 
-        if (isStrictMode === true || createRootStrictEffectsByDefault) {
+        if (isStrictMode === true) {
           mode |= StrictLegacyMode | StrictEffectsMode;
         }
 
@@ -28297,7 +28296,7 @@ to return true:wantsResponderID|                            |
       return root;
     }
 
-    var ReactVersion = "18.3.0-canary-a490d791";
+    var ReactVersion = "18.3.0-canary-4393a1cb";
 
     function createPortal$1(
       children,