Remove taxon-list component

[MartinJJones]

What

• Remove all files relating to the taxon-list component
• heading_level variable removed from the _tagged_content_list.html.erb template, a custom heading level is not currently used anywhere, the default heading level used by the taxon-list component was h2
• Use the list component from the gem instead of the taxon-list app component in several view templates where required
  • list_type: "number" has been used to ensure an ordered list is used to match the current HTML structure

Why

This component is no longer required, it was originally created for an AB Test on https://www.gov.uk/education/funding-and-finance-for-students#/education/student-grants-bursaries-scholarships

The same design can be achieved using the list component from the govuk-publishing-components gem

Visual changes

There are no visual changes, the HTML structure and spacing is the same as before

Example pages

• https://collections-pr-3844.herokuapp.com/world/afghanistan (accordion.html.erb)
• https://collections-pr-3844.herokuapp.com/world/living-in-afghanistan (tagged_content_list.html.erb)
• https://collections-pr-3844.herokuapp.com/government/ministers/secretary-of-state-for-foreign-commonwealth-and-development-affairs (past_role_holders.html.erb)

Trello card