Remove hardcoded FAQPage schema

We used this approach for the lead up to the election to present better
search results in Google informing people of voting process.  This has a lot
of manual overhead and requires much back and forth between content, product
and tech.  There's little reason for us to do this now that the election has
completed, so let's just revert to the standard schemas.

When we work out a method of better automating this, it should be revisited.

app/views/content_items/guide_single.html.erb

@@ -6,11 +6,9 @@
   ) %>
 <% end %>
 
-<% if MachineReadable::YamlFaqPageSchemaPresenter.configured?(@content_item) %>
 <script type="application/ld+json">
-  <%= raw MachineReadable::YamlFaqPageSchemaPresenter.new(@content_item).structured_data.to_json %>
+  <%= raw MachineReadable::GuideFaqPageSchemaPresenter.new(@content_item).structured_data.to_json %>
 </script>
-<% end %>
 
 <% content_for :simple_header, true %>
 

test/integration/guide_test.rb

@@ -112,20 +112,6 @@ class GuideTest < ActionDispatch::IntegrationTest
     assert_nil faq_schema
   end
 
-  # The schema config is in /config/machine_readable/voting-in-the-uk.yml
-  test "voting in the UK guide shows hard coded FAQ schema" do
-    setup_and_visit_voting_guide
-
-    faq_schema = find_structured_data(page, "FAQPage")
-    q_and_as = faq_schema["mainEntity"]
-
-    assert_equal faq_schema["@type"], "FAQPage"
-    assert_equal faq_schema["headline"], "How to vote"
-    assert_equal faq_schema["description"], "<p>You need to <a href=\"/register-to-vote?src=schema\">register to vote</a> before you can vote in UK elections or referendums.</p> <p>If you’re eligible, you can vote in person on the day of the election at a named polling station. You can also apply for a postal or proxy vote instead.</p>\n"
-
-    assert_equal 8, q_and_as.count
-  end
-
   test "voting in the UK guide shows all chapters on a single page" do
     content_item = setup_and_visit_voting_guide
     part_titles = content_item["details"]["parts"].map { |part| part["title"] }