Remove preview picture from single entry view page for #1875

Showing the preview picture usually leads to showing a duplicate
image, and frequently leads to showing duplicate images directly
adjacent to each other.

src/Wallabag/CoreBundle/Resources/views/themes/baggy/Entry/entry.html.twig

@@ -96,9 +96,6 @@
                 </div>
             </aside>
         </div>
-        {% if entry.previewPicture is not null %}
-            <div><img class="preview" src="{{ entry.previewPicture }}" alt="{{ entry.title|e|raw }}" /></div>
-        {% endif %}
         <article>
             {{ entry.content | raw }}
         </article>

src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/entry.html.twig

@@ -275,10 +275,6 @@
                 {{ render(controller( "WallabagCoreBundle:Tag:addTagForm", { 'id': entry.id } )) }}
             </div>
 
-            {% if entry.previewPicture is not null %}
-                <div><img class="preview" src="{{ entry.previewPicture }}" alt="{{ entry.title|striptags|default('entry.default_title'|trans)|raw }}" /></div>
-            {% endif %}
-
         </aside>
         <article>
             {{ entry.content | raw }}