Revert "release notes 2.1.4"

This reverts commit 4d78ac8.

shared/signaling/release-notes/web.mdx

@@ -1,56 +1,5 @@
 <PlatformWrapper platform="web">
 
-## v2.1.4
-
-v2.1.4 was released on September 8, 2023
-
-#### Compatibility changes
-
-This release changes the writing style of event listeners. After upgrading, you need to modify your implementation code as follows:
-
-- Before v2.1.4:
-
-    ```javascript
-    rtmClient.addEventListener({
-    message: msgEvent => {
-      // Message event notification processing logic
-    },
-
-    presence: presenceEvent => {
-      // Presence event notification processing logic
-    },
-
-    // Add other event listeners
-    });
-    ```
-
-- Since v2.1.4:
-
-    ```javascript
-    rtmClient.addEventListener('message', msgEvent => {
-      // Message event notification processing logic
-    });
-
-    rtmClient.addEventListener('presence', presenceEvent => {
-      // Presence event notification processing logic
-    });
-
-    // Add other event listeners
-    ```
-
-#### Improvements
-
-This release reduces the response time of the `logout` method.
-
-
-#### Issues fixed
-
-This release fixes the following issues:
-
-- The SDK version information was lost in the log file.
-- The `userId` property of the `GetStateResponse` data type was null.
-- After calling the `removeState` method, the SDK returned the `RemoveStateResponse` data type before the removing operation.
-
 ## v2.1.3
 
 v2.1.3 was released on July 12, 2023.