Revert "[Tooltip] Fix children mouse over detection (#32321)"

This reverts commit dc0e387bcdd6b4654f5e7fb472e6fba18c582deet .

See #32321 (comment) for why.

packages/mui-material/src/Tooltip/Tooltip.js

@@ -372,14 +372,10 @@ const Tooltip = React.forwardRef(function Tooltip(inProps, ref) {
       return;
     }
 
-    // Workaround for https://github.com/facebook/react/issues/7769
-    if (!childNode) {
-      setChildNode(event.currentTarget);
-    }
     // Remove the title ahead of time.
     // We don't want to wait for the next render commit.
     // We would risk displaying two tooltips at the same time (native + this one).
-    else {
+    if (childNode) {
       childNode.removeAttribute('title');
     }
 
@@ -424,6 +420,8 @@ const Tooltip = React.forwardRef(function Tooltip(inProps, ref) {
 
   const handleFocus = (event) => {
     // Workaround for https://github.com/facebook/react/issues/7769
+    // The autoFocus of React might trigger the event before the componentDidMount.
+    // We need to account for this eventuality.
     if (!childNode) {
       setChildNode(event.currentTarget);
     }

packages/mui-material/src/Tooltip/Tooltip.test.js

@@ -433,23 +433,6 @@ describe('<Tooltip />', () => {
       expect(getByRole('tooltip')).toBeVisible();
       expect(handleFocus.callCount).to.equal(1);
     });
-
-    it('should handle `onMouseOver` forwarding', () => {
-      const handleMouseOver = spy();
-      const { getByRole } = render(
-        <Tooltip enterDelay={100} title="Tooltip">
-          <button id="testChild" type="submit" onMouseOver={handleMouseOver}>
-            Hello World
-          </button>
-        </Tooltip>,
-      );
-
-      fireEvent.mouseOver(getByRole('button'));
-      clock.tick(100);
-
-      expect(getByRole('tooltip')).toBeVisible();
-      expect(handleMouseOver.callCount).to.equal(1);
-    });
   });
 
   describe('prop: delay', () => {