Remove orphaned code.

Remove orphaned code that is not called by anything.

Bug: 308003610
Test: Compile to verify no uses.
Flag: Not required; unreachable code path.
Change-Id: I4750c22ae0bd58e24a7e4b939a36be0064b8a7cd
diff --git a/telecomm/java/android/telecom/Connection.java b/telecomm/java/android/telecom/Connection.java
index 4a541da..ace2c03 100644
--- a/telecomm/java/android/telecom/Connection.java
+++ b/telecomm/java/android/telecom/Connection.java
@@ -3362,15 +3362,6 @@
     public void onDisconnect() {}
 
     /**
-     * Notifies this Connection of a request to disconnect a participant of the conference managed
-     * by the connection.
-     *
-     * @param endpoint the {@link Uri} of the participant to disconnect.
-     * @hide
-     */
-    public void onDisconnectConferenceParticipant(Uri endpoint) {}
-
-    /**
      * Notifies this Connection of a request to separate from its parent conference.
      */
     public void onSeparate() {}