Why should I put {% include JB/setup %} in each post in Jekyll bootstrap?

I am using Jekyll Bootstrap. And I can post an article, however I don't know why post template put {% include JB/setup %} in each post markdown file. I have little knowledge about ruby and Jekyll. But I check some document and I can understand some codes. But I still don't know what this means:

{% capture jbcache %}
  <!--
  - Dynamically set liquid variables for working with URLs/paths
  -->
  {% if site.JB.setup.provider == "custom" %}
    {% include custom/setup %}
  {% else %}
    {% if site.safe and site.JB.BASE_PATH and site.JB.BASE_PATH != '' %}
      {% assign BASE_PATH = site.JB.BASE_PATH %}
      {% assign HOME_PATH = site.JB.BASE_PATH %}
    {% else %}
      {% assign BASE_PATH = nil %}
      {% assign HOME_PATH = "/" %}
    {% endif %}

    {% if site.JB.ASSET_PATH %}
      {% assign ASSET_PATH = site.JB.ASSET_PATH %}
    {% else %}
      {% capture ASSET_PATH %}{{ BASE_PATH }}/assets/themes/{{ page.theme.name }}{% endcapture %}
    {% endif %}  
  {% endif %}
{% endcapture %}{% assign jbcache = nil %}

I have checked this question. I am still confused. So this is my question:

1. Why should I put {% include JB/setup %} in each post in Jekyll bootstrap?
2. Can I modify template to remove {% include JB/setup %} in each post?

This is because you are using command rake post title="new post name".

See Rakefile here:

puts "Creating new post: #{filename}"
open(filename, 'w') do |post|
  post.puts "---"
  post.puts "layout: post"
  post.puts "title: \"#{title.gsub(/-/,' ')}\""
  post.puts 'description: ""'
  post.puts "category: #{category}"
  post.puts "tags: #{tags}"
  post.puts "---"
  post.puts "{% include JB/setup %}"
end

Removing line post.puts "{% include JB/setup %}" will do the trick.