Remove InteractionManager docs (removed from React Native)

InteractionManager has been removed from React Native, so remove its
API doc page, sidebar entry, and the timers.md section. Update the two
broken links in performance.md and animations.md.

Author: rubennorte

docs/animations.md

@@ -669,4 +669,4 @@ As mentioned [in the Direct Manipulation section](legacy/direct-manipulation), `
 
 We could use this in the Rebound example to update the scale - this might be helpful if the component that we are updating is deeply nested and hasn't been optimized with `shouldComponentUpdate`.
 
-If you find your animations with dropping frames (performing below 60 frames per second), look into using `setNativeProps` or `shouldComponentUpdate` to optimize them. Or you could run the animations on the UI thread rather than the JavaScript thread [with the useNativeDriver option](/blog/2017/02/14/using-native-driver-for-animated). You may also want to defer any computationally intensive work until after animations are complete, using the [InteractionManager](interactionmanager). You can monitor the frame rate by using the In-App Dev Menu "FPS Monitor" tool.
+If you find your animations with dropping frames (performing below 60 frames per second), look into using `setNativeProps` or `shouldComponentUpdate` to optimize them. Or you could run the animations on the UI thread rather than the JavaScript thread [with the useNativeDriver option](/blog/2017/02/14/using-native-driver-for-animated). You can monitor the frame rate by using the In-App Dev Menu "FPS Monitor" tool.