Remove note that belongs in Controller Document spec.

index.html

@@ -925,14 +925,6 @@ <h3>Proofs</h3>
 representing time values to individuals.
         </p>
 
-<div class="issue">Add a note indicating that this specification should not
-be construed to indicate that public key controllers should be restricted to a
-single public key or that systems that use this spec and involve real people
-should identify each person as only ever being a single entity rather than
-perhaps N entities with M keys. There are no such restrictions and in many
-cases those kinds of restrictions are ill-advised due to privacy
-considerations.</div>
-
       <p>
 The Data Integrity specification supports the concept of multiple
 proofs in a single document. There are two types of multi-proof