fix: QA feedback - use spacing token, remove dead CSS class

Author: julhoang

static/css/v3/content-modal.css

@@ -72,7 +72,7 @@
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  padding: 4px;
+  padding: var(--space-s);
   background-color: var(--color-surface-strong);
   border-radius: var(--border-radius-l);
   color: var(--color-icon-primary);

templates/v3/includes/_content_modal.html

@@ -28,7 +28,7 @@
          role="button"
          href="{{ close_url|default:'#_' }}"
          aria-label="Close">
-        {% include "includes/icon.html" with icon_name="close" icon_class="content-modal__close-icon" icon_size=24 %}
+        {% include "includes/icon.html" with icon_name="close" icon_size=24 %}
       </a>
       <h2 class="content-modal__title" id="{{ modal_id }}-title">{{ title }}</h2>
       {% include "v3/includes/_carousel_buttons.html" with as_links=True prev_url=prev_url|default:"" next_url=next_url|default:"" only %}