Remove unused radio imports

The following were added without the macro ever
being called:
- app/templates/views/add-service-local.html
  (added in
  e6f49825e5)
- app/templates/views/service-settings/data-retention/edit.html
  (added in
  4b8b571a87)
- app/templates/views/organisations/organisation/settings/edit-domains.html
  (added in
  936883bf7b)

The following were used when they were first added
but not removed when the macro stopped being used:
- app/templates/views/edit-letter-template.html
  (macro removed in
  20ae200de9)
- app/templates/views/organisations/organisation/settings/edit-agreement.html
  (macro removed in
  45526598c6)

app/templates/views/add-service-local.html

@@ -1,5 +1,4 @@
 {% extends "withoutnav_template.html" %}
-{% from "components/radios.html" import radios %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/page-footer.html" import page_footer %}
 {% from "components/form.html" import form_wrapper %}

app/templates/views/edit-letter-template.html

@@ -2,7 +2,6 @@
 {% from "components/textbox.html" import textbox %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/page-footer.html" import sticky_page_footer %}
-{% from "components/radios.html" import radios %}
 {% from "components/form.html" import form_wrapper %}
 
 {% block service_page_title %}

app/templates/views/organisations/organisation/settings/edit-agreement.html

@@ -1,4 +1,3 @@
-{% from "components/radios.html" import radios %}
 {% from "components/page-footer.html" import page_footer %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/form.html" import form_wrapper %}

app/templates/views/organisations/organisation/settings/edit-domains.html

@@ -1,4 +1,3 @@
-{% from "components/radios.html" import radios %}
 {% from "components/page-footer.html" import page_footer %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/list-entry.html" import list_entry %}

app/templates/views/service-settings/data-retention/edit.html

@@ -2,7 +2,6 @@
 {% 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/radios.html" import radios %}
 
 {% block service_page_title %}
   Data retention