Merge pull request react-navigation#113 from react-navigation/satya164-patch-1

Remove unsupported configureTransition option

Author: brentvatne

docs/tab-navigator.md

@@ -22,7 +22,6 @@ The route configs object is a mapping from route name to a route config, which t
 * `animationEnabled` - Whether to animate when changing tabs.
 * `lazy` - Defaults to `true`. If `false`, all tabs are rendered immediately. When `true`, tabs are rendered only when they are made active.
 * `removeClippedSubviews` - Defaults to `true`. An optimization to reduce memory usage by freeing resources used by inactive tabs.
-* `configureTransition` - a function that, given `currentTransitionProps` and `nextTransitionProps`, returns a configuration object that describes the animation between tabs.
 * `initialLayout` - Optional object containing the initial `height` and `width`, can be passed to prevent the one frame delay in [react-native-tab-view](https://github.com/react-native-community/react-native-tab-view#avoid-one-frame-delay) rendering.
 * `tabBarOptions` - Configure the tab bar, see below.