trim non-existant pages further

app/main/validators.py

@@ -47,7 +47,7 @@ class ValidGovEmail:
         message = '''
             Enter a public sector email address or
             <a class="govuk-link govuk-link--no-visited-state" href="{}">find out who can use Notify</a>
-        '''.format(url_for('main.who_can_use_notify'))
+        '''.format(url_for('main.features'))
         if not is_gov_user(field.data.lower()):
             raise ValidationError(message)
 

app/main/views/index.py

@@ -293,15 +293,7 @@ def get_started():
 
 @main.route('/using-notify/who-its-for')
 def who_its_for():
-    return redirect(url_for('.who_can_use_notify'), 301)
-
-
-@main.route('/using-notify/who-can-use-notify')
-def who_can_use_notify():
-    return render_template(
-        'views/guidance/who-can-use-notify.html',
-        navigation_links=features_nav(),
-    )
+    return redirect(url_for('.features'), 301)
 
 
 @main.route('/trial-mode')