Update CHANGELOG.md

Author: danney-chun

CHANGELOG.md

@@ -25,10 +25,6 @@ Added new properties in `Reaction` to support more users
 ### **Improvements**
 - Fixed a bug where GET muted API is called every time
 - Fixed a bug when autoresend started, did not update channel info
-## v4.15.0 (Nov 07, 2024)
-### **Improvements**
-- Fixed a bug where `expiring_session=true` regardless of whether `SessionHandler` is registered when `authToken` exists
-- Fixed typo in `markPushNotificationAsClicked` logs
 ## v4.14.6 (Oct 24, 2024)
 ### **Improvements**
 - Fixed a bug where `expiring_session=true` regardless of whether `SessionHandler` is registered when `authToken` exists