Merge pull request #753 from ed-flanagan/patch-1

Remove proto3 alpha reference in Node.js tutorial

Author: hsaliak

docs/tutorials/basic/node.md

@@ -18,11 +18,10 @@ with [protocol
 buffers](https://developers.google.com/protocol-buffers/docs/overview). Note
 that the example in this tutorial uses the
 [proto3](https://github.com/google/protobuf/releases) version of the protocol
-buffers language, which is currently in alpha release: you can find out more in
-the [proto3 language
-guide](https://developers.google.com/protocol-buffers/docs/proto3) and see the
-[release notes](https://github.com/google/protobuf/releases) for the new version
-in the protocol buffers GitHub repository.
+buffers language. You can find out more in the
+[proto3 language guide](https://developers.google.com/protocol-buffers/docs/proto3)
+and see the [release notes](https://github.com/google/protobuf/releases) for
+the new version in the protocol buffers GitHub repository.
 
 <div id="toc"></div>