- Removed links to the gov uk stylesheets

- Deleted /stylesheets folder
- Removed sass build from gulpfile
- Changed gov links to usa links
- Changed other govuk styles, like breadcrumbs
- Changed name of uk_components file to us_components
- Fixed a few tests that broke on account of the changes

app/templates/views/documentation.html

@@ -19,12 +19,12 @@
       ('python', 'Python'),
       ('ruby', 'Ruby'),
     ] %}
-      <li><a class="govuk-link govuk-link--no-visited-state" href="https://docs.notifications.service.gov.uk/{{ key }}.html" target="_blank" rel="noopener">{{ label }}</a></li>
+      <li><a class="usa-link" href="https://docs.notifications.service.gov.uk/{{ key }}.html" target="_blank" rel="noopener">{{ label }}</a></li>
     {% endfor %}
   </ul>
     <p>A developer should be able to set up the API client and start sending test messages in around 30 minutes. A full integration can take a few days, depending on the other systems you’re using.</p>
   <h2 class="font-body-lg" id="integrate-directly-with-the-api">Integrate directly with the API</h2>
     <p>If you cannot use the client libraries, you can integrate directly with the API instead.</p>
-<p>Read the <a class="govuk-link govuk-link--no-visited-state" href="https://docs.notifications.service.gov.uk/rest-api.html" target="_blank" rel="noopener">REST API documentation</a> (this link opens in a new tab).</p>
+<p>Read the <a class="usa-link" href="https://docs.notifications.service.gov.uk/rest-api.html" target="_blank" rel="noopener">REST API documentation</a> (this link opens in a new tab).</p>
 
 {% endblock %}