Remove unintentional intentional mentions in replies

Signed-off-by: Tulir Asokan <tulir@maunium.net>

content/client-server-api/modules/rich_replies.md

@@ -182,10 +182,10 @@ text should be `"sent a video."`. For `m.audio`, the text should be
 #### Mentioning the replied to user
 
 In order to notify users of the reply, it may be desirable to include the `sender`
-of the replied to event and any users mentioned in that event. See
+of the replied to event. See [user and room mentions](#user-and-room-mentions)
-[user and room mentions](#user-and-room-mentions) for additional information.
+for additional information.
 
-An example including mentioning the original sender and other users:
+An example including mentioning the original sender:
 
 ```json5
 {
@@ -200,8 +200,6 @@ An example including mentioning the original sender and other users:
       "user_ids": [
         // The sender of $another_event.
         "@alice:example.org",
-        // Another Matrix ID copied from the m.mentions property of $another_event.
-        "@bob:example.org"
       ]
     }
   },