Remove deprecated base_path include helper

test/_pages/archive-layout-with-content.md

@@ -211,9 +211,4 @@ Still sticking with science and Albert Einstein's E = MC<sup>2</sup>, which shou
 
 ### Variable Tag
 
-This allows you to denote <var>variables</var>.
-
-{% include base_path %}
-{% for post in site.pages %}
-{% include archive-single.html %}
-{% endfor %}
+This allows you to denote <var>variables</var>.

test/_pages/sitemap.md

@@ -5,7 +5,7 @@ permalink: /sitemap/
 author_profile: false
 ---
 
-A list of all the posts and pages found on the site. For you robots out there is an [XML version]({{ base_path }}/sitemap.xml) available for digesting as well.
+A list of all the posts and pages found on the site. For you robots out there is an [XML version]({{ '/sitemap.xml' | relative_url }}) available for digesting as well.
 
 <h2>Pages</h2>
 {% for post in site.pages %}

test/_posts/2010-08-07-post-image-caption.md

@@ -7,10 +7,8 @@ tags:
   - Post Formats
 ---
 
-{% include base_path %}
-
 {% capture fig_img %}
-![Foo]({{ basepath }}/assets/images/unsplash-gallery-image-3.jpg)
+![Foo]({{ '/assets/images/unsplash-gallery-image-3.jpg' | relative_url }})
 {% endcapture %}
 
 <figure>

test/_posts/2012-03-15-layout-header-overlay-image.md

@@ -18,8 +18,6 @@ tags:
 last_modified_at: 2016-05-02T11:39:01-04:00
 ---
 
-{% include base_path %}
-
 This post should display a **header with an overlay image**, if the theme supports it.
 
 Non-square images can provide some unique styling issues.
@@ -30,7 +28,7 @@ This post tests overlay header images.
 
 You can use it by specifying the opacity (between 0 and 1) of a black overlay like so:
 
-![transparent black overlay]({{ basepath }}/assets/images/mm-header-overlay-black-filter.jpg)
+![transparent black overlay]({{ '/assets/images/mm-header-overlay-black-filter.jpg' | relative_url }})
 
 ```yaml
 excerpt: "This post should [...]"
@@ -45,7 +43,7 @@ header:
 
 Or if you want to do more fancy things, go full rgba:
 
-![transparent red overlay]({{ basepath }}/assets/images/mm-header-overlay-red-filter.jpg)
+![transparent red overlay]({{ '/assets/images/mm-header-overlay-red-filter.jpg' | relative_url }})
 
 ```yaml
 excerpt: "This post should [...]"