Broken link in documentation

[matthieucan]

Description

The last paragraph of react-native/docs/Networking.md contains a link to a page recently removed in 08dbc43

Reproduction Steps and Sample Code

Click on 'Navigators' in the last paragraph of https://facebook.github.io/react-native/docs/network.html

Solution

I didn't PR it since I don't know how you'd want to rephrase the conclusion.

Additional Information

• React Native version: 0.43