topLevelUpdateWarnings is only for dev mode hence not necessary to ha…

…ve extra dev mode check. (#11924)

packages/react-dom/src/client/ReactDOM.js

@@ -97,50 +97,45 @@ if (__DEV__) {
   }
 
   topLevelUpdateWarnings = (container: DOMContainer) => {
-    if (__DEV__) {
-      if (
-        container._reactRootContainer &&
-        container.nodeType !== COMMENT_NODE
-      ) {
-        const hostInstance = DOMRenderer.findHostInstanceWithNoPortals(
-          container._reactRootContainer._internalRoot.current,
+    if (container._reactRootContainer && container.nodeType !== COMMENT_NODE) {
+      const hostInstance = DOMRenderer.findHostInstanceWithNoPortals(
+        container._reactRootContainer._internalRoot.current,
+      );
+      if (hostInstance) {
+        warning(
+          hostInstance.parentNode === container,
+          'render(...): It looks like the React-rendered content of this ' +
+            'container was removed without using React. This is not ' +
+            'supported and will cause errors. Instead, call ' +
+            'ReactDOM.unmountComponentAtNode to empty a container.',
         );
-        if (hostInstance) {
-          warning(
-            hostInstance.parentNode === container,
-            'render(...): It looks like the React-rendered content of this ' +
-              'container was removed without using React. This is not ' +
-              'supported and will cause errors. Instead, call ' +
-              'ReactDOM.unmountComponentAtNode to empty a container.',
-          );
-        }
       }
+    }
 
-      const isRootRenderedBySomeReact = !!container._reactRootContainer;
-      const rootEl = getReactRootElementInContainer(container);
-      const hasNonRootReactChild = !!(
-        rootEl && ReactDOMComponentTree.getInstanceFromNode(rootEl)
-      );
+    const isRootRenderedBySomeReact = !!container._reactRootContainer;
+    const rootEl = getReactRootElementInContainer(container);
+    const hasNonRootReactChild = !!(
+      rootEl && ReactDOMComponentTree.getInstanceFromNode(rootEl)
+    );
 
-      warning(
-        !hasNonRootReactChild || isRootRenderedBySomeReact,
-        'render(...): Replacing React-rendered children with a new root ' +
-          'component. If you intended to update the children of this node, ' +
-          'you should instead have the existing children update their state ' +
-          'and render the new components instead of calling ReactDOM.render.',
-      );
+    warning(
+      !hasNonRootReactChild || isRootRenderedBySomeReact,
+      'render(...): Replacing React-rendered children with a new root ' +
+        'component. If you intended to update the children of this node, ' +
+        'you should instead have the existing children update their state ' +
+        'and render the new components instead of calling ReactDOM.render.',
+    );
 
-      warning(
-        container.nodeType !== ELEMENT_NODE ||
-          !((container: any): Element).tagName ||
-          ((container: any): Element).tagName.toUpperCase() !== 'BODY',
-        'render(): Rendering components directly into document.body is ' +
-          'discouraged, since its children are often manipulated by third-party ' +
-          'scripts and browser extensions. This may lead to subtle ' +
-          'reconciliation issues. Try rendering into a container element created ' +
-          'for your app.',
-      );
-    }
+    warning(
+      container.nodeType !== ELEMENT_NODE ||
+        !((container: any): Element).tagName ||
+        ((container: any): Element).tagName.toUpperCase() !== 'BODY',
+      'render(): Rendering components directly into document.body is ' +
+        'discouraged, since its children are often manipulated by third-party ' +
+        'scripts and browser extensions. This may lead to subtle ' +
+        'reconciliation issues. Try rendering into a container element created ' +
+        'for your app.',
+    );
   };
 
   warnOnInvalidCallback = function(callback: mixed, callerName: string) {