Remove rvm manual

Author: vongosling

README.md

@@ -2,13 +2,7 @@
 
 ## Installation
 
-In order to build the website and run it locally, you'll need to have Ruby version 2.4.1 installed. If you're using [RVM](https://rvm.io/):
-
-```bash
-$ rvm install . && rvm use .
-```
-
-If you're using [rbenv](https://github.com/rbenv/rbenv):
+In order to build the website and run it locally, you'll need to have Ruby version 2.4.1 installed. If you're using [rbenv](https://github.com/rbenv/rbenv):
 
 ```bash
 $ rbenv install && rbenv local 2.4.1
@@ -77,4 +71,4 @@ Javascript files:
 13. `jquery.url.js`
 14. `modernizr.foundation.js`
 15. `terrific-1.1.1.js`
-16. `jquery.cookie.js`
+16. `jquery.cookie.js`