Remove flow diagram. (#14)

Fixes [ACTION-34](http://www.w3.org/Payments/WG/track/actions/34).

index.html

@@ -231,14 +231,5 @@ <h2>Security and Privacy Considerations</h2>
       <p><strong>Note</strong>: Implementers may be subject to PCI DSS or other regulations, but discussion of those considerations lies outside the scope of this document.</p>
     </section>
 
-    <section id="flow">
-      <h2>Payment Method Flow</h2>
-      <p>The following represent the flow for all the supported <a>payment method identifier</a> strings as they could be used by a web site</p>
-      <p>The blue call-outs show where and how the API is invoked.</p>
-
-  	  <div><a href="http://www.plantuml.com/plantuml/proxy?fmt=svg&src=https://raw.githubusercontent.com/w3c/webpayments-flows/gh-pages/TargetFlows/Card/MerchantHosted-CardPayment-TargetWithSimpleApp.pml"><img width="100%" src="http://www.plantuml.com/plantuml/proxy?fmt=svg&src=https://raw.githubusercontent.com/w3c/webpayments-flows/gh-pages/TargetFlows/Card/MerchantHosted-CardPayment-TargetWithSimpleApp.pml"/></a></div>
-
-    </section>
-
   </body>
 </html>