diff --git a/core/modules/system/templates/image.html.twig b/core/modules/system/templates/image.html.twig
index 2f29304..6411eaa 100644
--- a/core/modules/system/templates/image.html.twig
+++ b/core/modules/system/templates/image.html.twig
@@ -12,9 +12,4 @@
  * @ingroup themeable
  */
 #}
-{%
-set classes = [
-  style_name ? 'image-style-' ~ style_name|clean_class,
-]
-%}
-<img{{ attributes.addClass(classes) }} />
+<img{{ attributes }} />
diff --git a/core/modules/system/templates/indentation.html.twig b/core/modules/system/templates/indentation.html.twig
index e5e7b32..a052783 100644
--- a/core/modules/system/templates/indentation.html.twig
+++ b/core/modules/system/templates/indentation.html.twig
@@ -17,4 +17,4 @@ See https://api.drupal.org/api/function/theme_indentation/8 for details.
 After copying this file to your theme's folder and customizing it, remove this
 HTML comment.
 -->
-{% for i in 1..size if size > 0 %}<div class="indentation">&nbsp;</div>{% endfor %}
+{% for i in 1..size if size > 0 %}<div></div>{% endfor %}
diff --git a/core/modules/system/templates/item-list.html.twig b/core/modules/system/templates/item-list.html.twig
index bd71e7f..fdb151e 100644
--- a/core/modules/system/templates/item-list.html.twig
+++ b/core/modules/system/templates/item-list.html.twig
@@ -19,7 +19,7 @@
  */
 #}
 {%- if items or empty -%}
-  <div class="item-list">
+  <div>
     {%- if title is not empty -%}
       <h3>{{ title }}</h3>
     {%- endif -%}