Remove description-or-summary partial and just use .Summary

I think this may have changed in Hugo's history, but now description and
summary are considered different things. The description is what goes in
metadata (and what search engines see), while the summary is the blurb
about the article that should be displayed when rendering a summary
(what I should've been using always here).

layouts/_partials/description-or-summary.html

@@ -1,7 +0,0 @@
-{{ with .Description }}
-    <p>{{ . | markdownify }}</p>
-{{ else }}
-    {{ with .Summary }}
-        {{ . }}
-    {{ end }}
-{{ end }}

layouts/authors/summary.html

@@ -5,9 +5,11 @@
 
 {{ partial "page-metadata/author.html" . }}
 
-<div class="page-description">
-    {{ partial "description-or-summary.html" . }}
-</div>
+{{ with .Summary }}
+    <div class="page-description">
+        {{ . }}
+    </div>
+{{ end }}
 
 <div class="readmore">
     <a href="{{ .Permalink }}">{{ i18n "read_more" }} &rarr;</a>

layouts/section.summary.html

@@ -5,8 +5,10 @@
             {{ .Title | markdownify }}
         </h2>
 
-        <div class="section-description">
-            {{ partial "description-or-summary.html" . }}
-        </div>
+        {{ with .Summary }}
+            <div class="section-description">
+                {{ . }}
+            </div>
+        {{ end }}
     </div>
 </a>

layouts/series/summary.html

@@ -6,9 +6,11 @@
 
 {{ partial "page-metadata/series.html" . }}
 
-<div class="page-description">
-    {{ partial "description-or-summary.html" . }}
-</div>
+{{ with .Summary }}
+    <div class="page-description">
+        {{ . }}
+    </div>
+{{ end }}
 
 <div class="page-list series-inner">
     {{ range .Data.Pages.Reverse }}

layouts/summary.html

@@ -8,9 +8,11 @@
 
 {{ partial "feature-figure.html" . }}
 
-<div class="page-description">
-    {{ partial "description-or-summary.html" . }}
-</div>
+{{ with .Summary }}
+    <div class="page-description">
+        {{ . }}
+    </div>
+{{ end }}
 
 <div class="readmore">
     <a href="{{ .Permalink }}">{{ i18n "read_more" }} &rarr;</a>

layouts/taxonomy.html

@@ -28,7 +28,7 @@
                             </a>
                             {{ partial "page-metadata/taxonomy.html" . }}
                         </div>
-                        {{ partial "description-or-summary.html" . }}
+                        {{ .Summary }}
                     </article>
                 {{ end }}
             {{ end }}