refactor: remove unused code related to whitelisted assets

proto/did/v1/query.proto

@@ -38,3 +38,14 @@ message QueryResolveResponse {
   // document is the DID document
   Document document = 1;
 }
+
+// Document defines a DID document
+message Document {
+  string id = 1;
+  string controller = 2; // The DID of the controller
+  repeated string authentication = 3;
+  repeated string assertion_method = 4;
+  repeated string capability_delegation = 5;
+  repeated string capability_invocation = 6;
+  repeated string service = 7;
+}