Remove "Proof" property section.

index.html

@@ -1573,65 +1573,6 @@ <h2>
 </pre>
     </section>
 
-    <section>
-      <h2>
-Proof (Optional)
-      </h2>
-
-      <p>
-A <code>proof</code> on a DID Document is cryptographic proof of the
-integrity of the DID Document according to either:
-      </p>
-
-      <ol start="1">
-        <li>
-The subject as defined in section <a href="#service-endpoints"></a>, or if not present:
-        </li>
-
-        <li>
-The delegate as defined in section 4.3.
-        </li>
-      </ol>
-
-      <p>
-This proof is NOT proof of the binding between a DID and a DID
-Document. See Section <a href="#binding-of-identity"></a>. The rules
-for a proof are:
-      </p>
-
-      <ol start="1">
-        <li>
-A DID Document MAY have exactly one property representing a
-proof.
-        </li>
-
-        <li>
-The key for this property MUST be <code>proof</code>.
-        </li>
-
-        <li>
-The value of this key MUST be a valid JSON-LD proof as defined by
-<a href="https://w3c-dvcg.github.io/ld-signatures/">Linked Data
-Proofs</a>.
-        </li>
-      </ol>
-
-      <p>
-Example:
-      </p>
-
-      <pre class="example nohighlight" title="A signature-based proof">
-{
-  "proof": {
-    "type": "LinkedDataSignature2015",
-    "created": "2016-02-08T16:02:20Z",
-    "creator": "did:example:8uQhQMGzWxR8vw5P3UWH1ja#keys-1",
-    "signatureValue": "QNB13Y7Q9...1tzjn4w=="
-  }
-}
-</pre>
-    </section>
-
     <section>
       <h2>
 Extensibility