Remove barely used tagline variable

_config.yml

@@ -1,5 +1,4 @@
 title:            Site Title
-tagline:          A short tagline
 description:      Describe your website.
 # Your site's domain goes here. Leave localhost server or blank when working locally.
 url:              http://localhost:4000

_layouts/post.html

@@ -25,7 +25,6 @@
   <article>
     <div class="headline-wrap">
       <h1>{{ page.title }}</h1>
-      <h2>{{ page.tagline }}</h2>
     </div><!--/ .headline-wrap -->
     <div class="article-wrap">
       {{ content }}

_posts/2012-05-22-readability-post.md

@@ -1,7 +1,6 @@
 ---
 layout: post
 title: "Testing Readability with a Bunch of Text"
-tagline: "A bunch of hipster ipsum for ya head."
 description: "A ton of text to test readability."
 tags: [sample post, readability, test]
 ---

_posts/2013-05-23-readability-feature-post.md

@@ -1,7 +1,6 @@
 ---
 layout: post
 title: "Post with Large Feature Image and Text"
-tagline: "A bunch of hipster ipsum for ya head."
 description: "Custom written post descriptions are the way to go... if you're not lazy."
 tags: [sample post, readability, test]
 image:

feed.xml

@@ -4,7 +4,6 @@ layout: none
 <?xml version="1.0" encoding="utf-8"?>
 <feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
 <title type="text">{{ site.title }}</title>
-<subtitle type="text">{{ site.tagline }}</subtitle>
 <generator uri="https://github.com/jekyll/jekyll">Jekyll</generator>
 <link rel="self" type="application/atom+xml" href="{{ site.url }}/feed.xml" />
 <link rel="alternate" type="text/html" href="{{ site.url }}" />