Revert dimensions.js change

To unbreak the sync

Libraries/Utilities/Dimensions.js

@@ -57,8 +57,6 @@ class Dimensions {
    * than caching the value (for example, using inline styles rather than
    * setting a value in a `StyleSheet`).
    *
-   * Example: `var {height, width} = Dimensions.get('window');`
-   *
    * @param {string} dim Name of dimension as defined when calling `set`.
    * @returns {Object?} Value for the dimension.
    */