[ci skip] Actually, remove SemVer badge.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>

README.rdoc

@@ -4,7 +4,6 @@ to a popular FizzBuzz problem for Ruby.
 Written in C as an example of using Ruby's C API - with the support
 for arbitrary large numeric values via the Bignum class.
 
-{<img src="http://semver.org" alt="Semantic Versioning"/>}[http://semver.org/]
 {<img src="https://travis-ci.org/kwilczynski/ruby-fizzbuzz.png?branch=master" alt="Build Status"/>}[https://travis-ci.org/kwilczynski/ruby-fizzbuzz]
 {<img src="http://inch-ci.org/github/kwilczynski/ruby-fizzbuzz.svg?branch=master" alt="Documentation Status" />}[http://inch-ci.org/github/kwilczynski/ruby-fizzbuzz]
 {<img src="https://badge.fury.io/rb/ruby-fizzbuzz.png" alt="Gem Version" />}[http://badge.fury.io/rb/ruby-fizzbuzz]