Change: Always send rich replies, remove ement-room-send-rich-replies

* ement-room.el (ement-room-send-rich-replies):
* ement-lib.el (ement-room-send-rich-replies, ement-send-message):
Always send rich replies.

ement-lib.el

@@ -59,7 +59,6 @@
 (defvar ement-room-buffer-name-prefix)
 (defvar ement-room-buffer-name-suffix)
 (defvar ement-room-leave-kill-buffer)
-(defvar ement-room-send-rich-replies)
 (defvar ement-room-prism)
 (defvar ement-room-prism-color-adjustment)
 (defvar ement-room-prism-minimum-contrast)
@@ -1113,15 +1112,14 @@ suggested room."
     (alist-get selected-name name-to-room-session nil nil #'string=)))
 
 (cl-defun ement-send-message (room session
-                                   &key body formatted-body replying-to-event rich-reply filter then)
+                                   &key body formatted-body replying-to-event filter then)
   "Send message to ROOM on SESSION with BODY and FORMATTED-BODY.
 THEN may be a function to call after the event is sent
 successfully.  It is called with keyword arguments for ROOM,
 SESSION, CONTENT, and DATA.
 
 REPLYING-TO-EVENT may be an event the message is
 in reply to; the message will reference it appropriately.
-If RICH-REPLY is non-nil, then a rich-reply is sent instead.
 
 FILTER may be a function through which to pass the message's
 content object before sending (see,
@@ -1144,10 +1142,9 @@ e.g. `ement-room-send-org-filter')."
     (when filter
       (setf content (funcall filter content room)))
     (when replying-to-event
-      (when ement-room-send-rich-replies
-          ;; TODO: Submit a patch to Emacs to enable `map-nested-elt' to work as a generalized variable.
-          (setf (map-elt (map-elt (map-elt content 'm.relates_to) 'm.in_reply_to) 'event_id)
-                (ement-event-id replying-to-event)))
+      ;; TODO: Submit a patch to Emacs to enable `map-nested-elt' to work as a generalized variable.
+      (setf (map-elt (map-elt (map-elt content 'm.relates_to) 'm.in_reply_to) 'event_id)
+            (ement-event-id replying-to-event))
       (setf content (ement--add-reply content replying-to-event room)))
     (ement-api session endpoint :method 'put :data (json-encode content)
       :then (apply-partially then :room room :session session

ement-room.el

@@ -710,14 +710,6 @@ When using a light theme, it may be necessary to use a negative
 number (to darken rather than lighten)."
   :type 'integer)
 
-(defcustom ement-room-send-rich-replies nil
-  ;; TODO: Switch this default to non-nil in the future, and eventually remove the option.
-  "Whether to send rich replies when replying to messages.
-When non-nil, \"rich replies\" are sent, which encode the
-relationship between messages in their metadata."
-  :type 'boolean
-  :link '(url-link "https://spec.matrix.org/v1.3/client-server-api/#rich-replies"))
-
 ;;;; Macros
 
 (defmacro ement-room-with-highlighted-event-at (position &rest body)