diff --git a/packages/react/src/ReactElement.js b/packages/react/src/ReactElement.js
index a2914b78fc221..a0bfd0d551691 100644
--- a/packages/react/src/ReactElement.js
+++ b/packages/react/src/ReactElement.js
@@ -22,26 +22,10 @@ const RESERVED_PROPS = {
 let specialPropKeyWarningShown, specialPropRefWarningShown;
 
 function hasValidRef(config) {
-  if (__DEV__) {
-    if (hasOwnProperty.call(config, 'ref')) {
-      const getter = Object.getOwnPropertyDescriptor(config, 'ref').get;
-      if (getter && getter.isReactWarning) {
-        return false;
-      }
-    }
-  }
   return config.ref !== undefined;
 }
 
 function hasValidKey(config) {
-  if (__DEV__) {
-    if (hasOwnProperty.call(config, 'key')) {
-      const getter = Object.getOwnPropertyDescriptor(config, 'key').get;
-      if (getter && getter.isReactWarning) {
-        return false;
-      }
-    }
-  }
   return config.key !== undefined;
 }
 
@@ -121,45 +105,6 @@ const ReactElement = function(type, key, ref, self, source, owner, props) {
     // Record the component responsible for creating this element.
     _owner: owner,
   };
-
-  if (__DEV__) {
-    // The validation flag is currently mutative. We put it on
-    // an external backing store so that we can freeze the whole object.
-    // This can be replaced with a WeakMap once they are implemented in
-    // commonly used development environments.
-    element._store = {};
-
-    // To make comparing ReactElements easier for testing purposes, we make
-    // the validation flag non-enumerable (where possible, which should
-    // include every environment we run tests in), so the test framework
-    // ignores it.
-    Object.defineProperty(element._store, 'validated', {
-      configurable: false,
-      enumerable: false,
-      writable: true,
-      value: false,
-    });
-    // self and source are DEV only properties.
-    Object.defineProperty(element, '_self', {
-      configurable: false,
-      enumerable: false,
-      writable: false,
-      value: self,
-    });
-    // Two elements created in two different places should be considered
-    // equal for testing purposes and therefore we hide it from enumeration.
-    Object.defineProperty(element, '_source', {
-      configurable: false,
-      enumerable: false,
-      writable: false,
-      value: source,
-    });
-    if (Object.freeze) {
-      Object.freeze(element.props);
-      Object.freeze(element);
-    }
-  }
-
   return element;
 };
 
@@ -209,11 +154,6 @@ export function createElement(type, config, children) {
     for (let i = 0; i < childrenLength; i++) {
       childArray[i] = arguments[i + 2];
     }
-    if (__DEV__) {
-      if (Object.freeze) {
-        Object.freeze(childArray);
-      }
-    }
     props.children = childArray;
   }
 
@@ -226,25 +166,6 @@ export function createElement(type, config, children) {
       }
     }
   }
-  if (__DEV__) {
-    if (key || ref) {
-      if (
-        typeof props.$$typeof === 'undefined' ||
-        props.$$typeof !== REACT_ELEMENT_TYPE
-      ) {
-        const displayName =
-          typeof type === 'function'
-            ? type.displayName || type.name || 'Unknown'
-            : type;
-        if (key) {
-          defineKeyPropWarningGetter(props, displayName);
-        }
-        if (ref) {
-          defineRefPropWarningGetter(props, displayName);
-        }
-      }
-    }
-  }
   return ReactElement(
     type,
     key,