Add JS deprecation error suppression

Our build got broken by the deprecation of goog.structs.Map in [] This is a quick fix.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=157236744

java/google/registry/ui/js/session.js

@@ -30,6 +30,7 @@ goog.forwardDeclare('goog.Uri');
  * @param {!registry.Session.ContentType} contentType Payload mode.
  * @constructor
  * @template REQUEST, RESPONSE
+ * @suppress {deprecated}
  */
 registry.Session = function(defaultUri, xsrfToken, contentType) {