[react-ui] Remove event object warnings (#16822)

Author: trueadm

packages/react-dom/src/events/DOMEventResponderSystem.js

@@ -303,16 +303,6 @@ function validateEventValue(eventValue: any): void {
  );
  }
  };
- eventValue.preventDefault = () => {
- if (__DEV__) {
- showWarning('preventDefault()');
- }
- };
- eventValue.stopPropagation = () => {
- if (__DEV__) {
- showWarning('stopPropagation()');
- }
- };
  eventValue.isDefaultPrevented = () => {
  if (__DEV__) {
  showWarning('isDefaultPrevented()');

packages/react-dom/src/events/__tests__/DOMEventResponderSystem-test.internal.js

@@ -837,30 +837,6 @@ describe('DOMEventResponderSystem', () => {
  </button>
  );
  };
- expect(() => {
- handler = event => {
- event.preventDefault();
- };
- ReactDOM.render(<Test />, container);
- dispatchClickEvent(buttonRef.current);
- }).toWarnDev(
- 'Warning: preventDefault() is not available on event objects created from event responder modules ' +
- '(React Flare).' +
- ' Try wrapping in a conditional, i.e. `if (event.type !== "press") { event.preventDefault() }`',
- {withoutStack: true},
- );
- expect(() => {
- handler = event => {
- event.stopPropagation();
- };
- ReactDOM.render(<Test />, container);
- dispatchClickEvent(buttonRef.current);
- }).toWarnDev(
- 'Warning: stopPropagation() is not available on event objects created from event responder modules ' +
- '(React Flare).' +
- ' Try wrapping in a conditional, i.e. `if (event.type !== "press") { event.stopPropagation() }`',
- {withoutStack: true},
- );
  expect(() => {
  handler = event => {
  event.isDefaultPrevented();