DEV: Remove deprecation for `Discourse.Session`

DEV: Remove deprecation for Discourse.Session

diff --git a/app/assets/javascripts/discourse/app/models/session.js b/app/assets/javascripts/discourse/app/models/session.js
index 9f05080..517cf76 100644
--- a/app/assets/javascripts/discourse/app/models/session.js
+++ b/app/assets/javascripts/discourse/app/models/session.js
@@ -1,6 +1,5 @@
 import RestModel from "discourse/models/rest";
 import Singleton from "discourse/mixins/singleton";
-import deprecated from "discourse-common/lib/deprecated";
 
 // A data model representing current session data. You can put transient
 // data here you might want later. It is not stored or serialized anywhere.
@@ -12,13 +11,4 @@ const Session = RestModel.extend({
 
 Session.reopenClass(Singleton);
 
-Object.defineProperty(Discourse, "Session", {
-  get() {
-    deprecated("Import the Session object instead of using Discourse.Session", {
-      since: "2.4.0",
-      dropFrom: "2.5.0"
-    });
-    return Session;
-  }
-});
 export default Session;

GitHub sha: 4c17ff98