Remove deprecated "page.header.cta_url" setting (#4821)

_includes/page__hero.html

@@ -36,9 +36,6 @@ <h1 id="page-title" class="page__title" itemprop="headline">
         <p class="page__lead">{{ page.excerpt | markdownify | remove: "<p>" | remove: "</p>" }}</p>
       {% endif %}
       {% include page__meta.html %}
-      {% if page.header.cta_url %}
-        <p><a href="{{ page.header.cta_url | relative_url }}" class="btn btn--light-outline btn--large">{{ page.header.cta_label | default: site.data.ui-text[site.locale].more_label | default: "Learn More" }}</a></p>
-      {% endif %}
       {% if page.header.actions %}
         <p>
         {% for action in page.header.actions %}

docs/_docs/10-layouts.md

@@ -463,8 +463,6 @@ To overlay text on top of a header image you have a few more options:
 | **excerpt**              | Auto-generated page excerpt is added to the overlay text or can be overridden. | |
 | **tagline**              | Overrides page excerpt. Useful when header text needs to be different from excerpt in archive views. | |
 | **actions**              | Call to action button links (`actions` array: `label` and `url`). More than one button link can be assigned. | |
-| **cta_label**            | Deprecated, use `actions` instead. Call to action button text label. | `more_label` in UI Text data file |
-| **cta_url**              | Deprecated, use `actions` instead. Call to action button URL. | |
 
   [mdn-linear-gradient]: https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient()