Remove re-enter password step from rename organisation

Note that this is copied from the same change made to the rename service
page:
1190e4541b

The original idea behind was to always ask users to re-enter their
password any time:
- we want them to be sure that they want to do what they’re about to do
- we want to be sure it’s really the user trying to do the thing (and
  not someone malicious)

In reality we:
- removed this from the initial place it was added (a descendent of the
  ‘suspend service’ feature)
- only ever added it to the ‘rename service’ and ‘rename organisation’
  features

So in reality it’s not a pattern we have persisted with. Arguably there
are several things you can now do in the admin app without re-entering
your password which are much more high consequence than changing the
service name.

Also, with browser autofill there’s a lot less chance that forcing
someone to re-enter a password really gives much defence against an
unattended laptop, for example.

So this commit removes the need to re-enter your password when renaming
an organisation.

app/templates/views/organisations/organisation/settings/edit-name/confirm.html

@@ -1,30 +0,0 @@
-{% extends "org_template.html" %}
-{% from "components/page-header.html" import page_header %}
-{% from "components/page-footer.html" import page_footer %}
-{% from "components/form.html" import form_wrapper %}
-{% from "components/back-link/macro.njk" import govukBackLink %}
-
-{% block org_page_title %}
-  Confirm organisation name change
-{% endblock %}
-
-{% block backLink %}
-  {{ govukBackLink({ "href": url_for('.organisation_settings', org_id=current_org.id) }) }}
-{% endblock %}
-
-{% block maincolumn_content %}
-
-  {{ page_header('Confirm organisation name change') }}
-
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-three-quarters">
-
-    {% call form_wrapper() %}
-      {{ form.password(param_extensions={"autocomplete": "current-password"}) }}
-      <p class="govuk-body"> Your organisation name will be changed from {{ current_org.name }} to {{ new_name }} </p>
-      {{ page_footer('Confirm') }}
-    {% endcall %}
-    </div>
-  </div>
-
-{% endblock %}