Remove opinion from Node.js .gitignore file

This is a PR to remove the opinionated lines from the Node.js .gitignore file.

I do not believe that Github's pre-baked .gitignore files should be promulgating opinions, especially in a community that is as fresh as the Node.js community.  Questions of what should be checked in should be a decision made on an organization-by-organization basis, or left up to the individual.  Github's inclusion of opinion in these files puts unnecessary authority behind that opinion, which can have the negative side-effect of people following without thinking.

Node.gitignore

@@ -20,6 +20,4 @@ coverage
 build/Release
 
 # Dependency directory
-# Deployed apps should consider commenting this line out:
-# see https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git
 node_modules