Remove all the unused agreement pages and associated tests

app/main/__init__.py

@@ -4,7 +4,6 @@
 
 from app.main.views import (  # noqa isort:skip
     add_service,
-    agreement,
     api_keys,
     choose_account,
     code_not_received,

app/navigation.py

@@ -191,9 +191,6 @@ class HeaderNavigation(Navigation):
             "service_add_email_reply_to",
             "service_add_letter_contact",
             "service_add_sms_sender",
-            "service_agreement",
-            "service_accept_agreement",
-            "service_confirm_agreement",
             "service_confirm_delete_email_reply_to",
             "service_confirm_delete_letter_contact",
             "service_confirm_delete_sms_sender",
@@ -306,8 +303,6 @@ class HeaderNavigation(Navigation):
         "organisation_preview_letter_branding",
         "organisations",
         "privacy",
-        "public_agreement",
-        "public_download_agreement",
         "redact_template",
         "register",
         "register_from_invite",
@@ -330,7 +325,6 @@ class HeaderNavigation(Navigation):
         "service_delete_email_reply_to",
         "service_delete_letter_contact",
         "service_delete_sms_sender",
-        "service_download_agreement",
         "service_letter_validation_preview",
         "service_switch_upload_document",
         "service_switch_count_as_live",
@@ -434,9 +428,6 @@ class MainNavigation(Navigation):
             "service_add_email_reply_to",
             "service_add_letter_contact",
             "service_add_sms_sender",
-            "service_agreement",
-            "service_accept_agreement",
-            "service_confirm_agreement",
             "service_confirm_delete_email_reply_to",
             "service_confirm_delete_letter_contact",
             "service_confirm_delete_sms_sender",
@@ -674,8 +665,6 @@ class OrgNavigation(Navigation):
         "platform_admin_returned_letters",
         "pricing",
         "privacy",
-        "public_agreement",
-        "public_download_agreement",
         "received_text_messages_callback",
         "redact_template",
         "register",
@@ -706,9 +695,6 @@ class OrgNavigation(Navigation):
         "service_add_email_reply_to",
         "service_add_letter_contact",
         "service_add_sms_sender",
-        "service_agreement",
-        "service_accept_agreement",
-        "service_confirm_agreement",
         "service_confirm_delete_email_reply_to",
         "service_confirm_delete_letter_contact",
         "service_confirm_delete_sms_sender",
@@ -717,7 +703,6 @@ class OrgNavigation(Navigation):
         "service_delete_email_reply_to",
         "service_delete_letter_contact",
         "service_delete_sms_sender",
-        "service_download_agreement",
         "service_edit_email_reply_to",
         "service_edit_letter_contact",
         "service_edit_sms_sender",