[material-ui][docs] Update the "showing and hiding" section on the To…

…oltip page (#40283)

docs/data/material/components/tooltips/tooltips.md

@@ -174,7 +174,7 @@ You need to create an object shaped like the [`VirtualElement`](https://popper.j
 
 ## Showing and hiding
 
-The tooltip is normally shown immediately when the user's mouse hovers over the element, and hides immediately when the user's mouse leaves. A delay in showing or hiding the tooltip can be added through the `enterDelay` and `leaveDelay` props, as shown in the Controlled Tooltips demo above.
+The tooltip is normally shown immediately when the user's mouse hovers over the element, and hides immediately when the user's mouse leaves. A delay in showing or hiding the tooltip can be added through the `enterDelay` and `leaveDelay` props.
 
 On mobile, the tooltip is displayed when the user longpresses the element and hides after a delay of 1500ms. You can disable this feature with the `disableTouchListener` prop.