README: Removes v0.11 workaround section.

* Reason: njs v0.11 is not relavent any more.
* Solution: Update to node v0.12 with which
            node-sass v2.0.1 is compatible OOTB.

README.md

@@ -279,9 +279,6 @@ npm install -g node-gyp
 node-gyp rebuild  # to make debug release, use -d switch
 ```
 
-### Workaround for node `v0.11.13` `v0.11.14`
-Follow the steps above, but comment out this [line](https://github.com/sass/node-sass/blob/e01497c4d4b8a7a7f4dbf9d607920ac10ad64445/lib/index.js#L181) in `lib/index.js` before the `npm install` step. Then uncomment it back again, and continue with the rest of the steps (see issue [#563](https://github.com/sass/node-sass/issues/563)).
-
 ## Command Line Interface
 
 The interface for command-line usage is fairly simplistic at this stage, as seen in the following usage section.