[docs] Fix select multiple prop description

packages/material-ui/src/Select/Select.js

@@ -121,7 +121,6 @@ Select.propTypes = {
   MenuProps: PropTypes.object,
   /**
    * If true, `value` must be an array and the menu will support multiple selections.
-   * You can only use it when the `native` property is `false` (default).
    */
   multiple: PropTypes.bool,
   /**

pages/api/select.md

@@ -26,7 +26,7 @@ import Select from '@material-ui/core/Select';
 | <span class="prop-name">input</span> | <span class="prop-type">element</span> | <span class="prop-default">&lt;Input /></span> | An `Input` element; does not have to be a material-ui specific `Input`. |
 | <span class="prop-name">inputProps</span> | <span class="prop-type">object</span> |   | Attributes applied to the `input` element. When `native` is `true`, the attributes are applied on the `select` element. |
 | <span class="prop-name">MenuProps</span> | <span class="prop-type">object</span> |   | Properties applied to the [`Menu`](/api/menu/) element. |
-| <span class="prop-name">multiple</span> | <span class="prop-type">bool</span> | <span class="prop-default">false</span> | If true, `value` must be an array and the menu will support multiple selections. You can only use it when the `native` property is `false` (default). |
+| <span class="prop-name">multiple</span> | <span class="prop-type">bool</span> | <span class="prop-default">false</span> | If true, `value` must be an array and the menu will support multiple selections. |
 | <span class="prop-name">native</span> | <span class="prop-type">bool</span> | <span class="prop-default">false</span> | If `true`, the component will be using a native `select` element. |
 | <span class="prop-name">onChange</span> | <span class="prop-type">func</span> |   | Callback function fired when a menu item is selected.<br><br>**Signature:**<br>`function(event: object, child?: object) => void`<br>*event:* The event source of the callback. You can pull out the new value by accessing `event.target.value`.<br>*child:* The react element that was selected when `native` is `false` (default). |
 | <span class="prop-name">onClose</span> | <span class="prop-type">func</span> |   | Callback fired when the component requests to be closed. Use in controlled mode (see open).<br><br>**Signature:**<br>`function(event: object) => void`<br>*event:* The event source of the callback |