password resets using warehouse only

we seem to have subtly broken pypi-legacy's reset flow

templates/password_reset.pt

@@ -4,27 +4,18 @@
       xmlns:metal="http://xml.zope.org/namespaces/metal"
       metal:use-macro="standard_template/macros/page">
   <metal:fill fill-slot="body">
-    <p>To reset your account password please enter the username below.</p>
 
-    <p tal:condition="data/retry | nothing"><strong>You must supply a
-      username!</strong></p>
+  <p>Initiating password resets via site is no longer supported.</p>
 
-    <form tal:attributes="action app/url_path" method="POST">
-      <input type="hidden" name=":action" value="forgotten_password" />
-      <table class="form">
-    <tr>
-      <th>Username:</th>
-      <td><input name="name" /></td>
-    </tr>
-    <tr>
-      <td></td>
-      <td><input type="submit" value="Reset password" /></td>
-    </tr>
-      </table>
-    </form>
-
-    <p>An email will be sent to you at the account registered address -
-    please follow the instructions within it to complete the reset process.</p>
+  <p>Please reset your password using
+    <tal:x tal:condition="python:'testpypi' in app.config.url">
+    <a href="https://test.pypi.org/account/request-password-reset/">the Warehouse test instance</a>
+    </tal:x>
+    <tal:x tal:condition="python:'testpypi' not in app.config.url">
+    <a href="https://pypi.org/account/request-password-reset/">Warehouse</a>
+    </tal:x>
+    in order to continue.
+  </p>
 
   </metal:fill>
 </html>