Revert "Fixed the incorrect flag type"

This reverts commit 8f762c360fad9f8d065a57658f701cee9246ba03.

Reason for revert: flag type can't be changed during ramp up.

Change-Id: I3ce352cc635b6656a749173313e718007c8db01f
diff --git a/flags/data.aconfig b/flags/data.aconfig
index 321ac6b..ccd5db4 100644
--- a/flags/data.aconfig
+++ b/flags/data.aconfig
@@ -102,15 +102,12 @@
   bug:"318519337"
 }
 
-# OWNER=jackyu TARGET=25Q1
+# OWNER=jackyu TARGET=24Q4
 flag {
   name: "dds_callback"
   namespace: "telephony"
   description: "Adding new callback when DDS changed"
   bug:"353723350"
-  metadata {
-    purpose: PURPOSE_BUGFIX
-  }
 }
 
 # OWNER=jackyu TARGET=25Q1