RN: Fix testID on Switch

Summary: My recent refactor of `Switch` broke `testID` from being passed down to the underlying component. This fixes that.

Reviewed By: TheSavior

Differential Revision: D9127216

fbshipit-source-id: 6d442b1cc19cf9f44cb48faac58e5abe9f36064b

Author: yungsters

Libraries/Components/Switch/Switch.js

@@ -73,11 +73,6 @@ export type Props = $ReadOnly<{|
    * event, use `onChange`.
    */
   onValueChange?: ?(value: boolean) => Promise<void> | void,
-
-  /**
-   * Identifier used to find this view in tests.
-   */
-  testID?: ?string,
 |}>;
 
 // @see ReactSwitchManager.java
@@ -133,7 +128,6 @@ class Switch extends React.Component<Props> {
       onChange,
       onValueChange,
       style,
-      testID,
       thumbColor,
       trackColor,
       value,