Remove branding_radios macro

No longer used by any template so remove.

(It'll still be in the history if we need it.)

app/templates/components/radios.html

@@ -91,51 +91,6 @@
 {% endmacro %}
 
 
-{% macro branding_radios(
-  field,
-  hint=None,
-  branding_dict={},
-  show_header=True
-) %}
-  <div class="form-group {% if field.errors %} form-group-error{% endif %}">
-    <fieldset>
-      <legend class="form-label">
-        {% if show_header %}
-          {{ field.label.text }}
-        {% endif %}
-        {% if field.errors %}
-            <span class="error-message" data-module="track-error" data-error-type="{{ field.errors[0] }}" data-error-label="{{ field.name }}">
-              {{ field.errors[0] }}
-            </span>
-        {% endif %}
-      </legend>
-      {% for value, option, checked in field.iter_choices() %}
-        <div class="multiple-choice branding-radio">
-          <input
-            type="radio"
-            name="{{ field.name }}"
-            id="{{ field.name }}-{{ loop.index }}"
-            value="{{ value }}"
-            {% if checked %}checked="checked"{% endif %}
-          />
-          <label class="block-label" for="{{ field.name }}-{{ loop.index }}">
-            {% if branding_dict.get(value, {}).get('colour') %}
-              <span style="background: {{ branding_dict[value].colour }}; display: inline-block; width: 3px; height: 27px;"></span>
-            {% endif %}
-            {% if branding_dict.get(value, {}).get('logo') %}
-              <img
-                src="{{ branding_dict[value].logo }}"
-                height="27"
-              />
-            {% endif %}
-            {{option}}
-          </label>
-        </div>
-      {% endfor %}
-    </fieldset>
-  </div>
-{% endmacro %}
-
 {% macro conditional_radio_panel(id) %}
   <div class="conditional-radios-panel" id="panel-{{ id }}">
     {{ caller() }}