Remove duplicate jekyll-sass-converter entry

Author: laymonage

Gemfile.lock

@@ -22,7 +22,6 @@ GEM
     jekyll-gist (1.4.0)
       octokit (~> 4.2)
     jekyll-paginate (1.1.0)
-    jekyll-sass-converter (1.4.0)
       sass (~> 3.4)
     jekyll-watch (1.5.0)
       listen (~> 3.0, < 3.1)