Editorial: remove redundant section

closes #475, #629

index.html

@@ -840,8 +840,7 @@ <h2>
  rejected with a "<a>SecurityError</a>" <a>DOMException</a>. For
  example, the <a>user agent</a> may require the call to be
  <a>triggered by user activation</a>, or may limit the rate at
- which a page can call <a>show()</a>, as described in the <a href=
- "#privacy">privacy considerations</a> section.
+ which a page can call <a>show()</a>.
  </p>
  <p class="note">
  During the Candidate Recommendation phase, implementations are
@@ -3352,22 +3351,6 @@ <h2>
  consent.
  </p>
  </section>
- <section>
- <h2>
- Exposing available payment methods
- </h2>
- <p>
- Developers might try to call the payment request API repeatedly with
- only one payment method identifier to try to determine what payment
- methods a <a>user agent</a> has installed. There are legitimate
- scenarios for calling repeatedly (for example, to control the flow of
- payment method selection). The fact that a successful match to a
- payment method causes a user interface to be displayed mitigates the
- disclosure risk. Implementations MAY require a user action to
- initiate a payment request or they MAY rate limit the calls to the
- API to prevent too many repeated calls.
- </p>
- </section>
  </section>
  <section id="dependencies">
  <h2>