Fix DrawerLayoutAndroid method parameter

Summary:Oups, forgot to remove a test in #6890 :)
Closes https://github.com/facebook/react-native/pull/6898

Differential Revision: D3161421

Pulled By: mkonicek

fb-gh-sync-id: a7e6b4f31822e67dcf1d898306851a112160d20f
fbshipit-source-id: a7e6b4f31822e67dcf1d898306851a112160d20f

Libraries/Components/DrawerAndroid/DrawerLayoutAndroid.android.js

@@ -226,7 +226,7 @@ var DrawerLayoutAndroid = React.createClass({
   /**
    * Opens the drawer.
    */
-  openDrawer: function(test: number) {
+  openDrawer: function() {
     UIManager.dispatchViewManagerCommand(
       this._getDrawerLayoutHandle(),
       UIManager.AndroidDrawerLayout.Commands.openDrawer,