diff --git a/mautrix/types/event/message.py b/mautrix/types/event/message.py
index 30b1a153..32033581 100644
--- a/mautrix/types/event/message.py
+++ b/mautrix/types/event/message.py
@@ -119,7 +119,7 @@ def set_thread_parent(
                 thread_parent.content.get_thread_parent() or self.relates_to.event_id
             )
         if not disable_reply_fallback:
-            self.set_reply(last_event_in_thread or thread_parent, disable_fallback=True, **kwargs)
+            self.set_reply(last_event_in_thread or thread_parent, **kwargs)
             self.relates_to.is_falling_back = True
 
     def set_edit(self, edits: Union[EventID, "MessageEvent"]) -> None:
@@ -287,25 +287,6 @@ class TextMessageEventContent(BaseMessageEventContent, SerializableAttrs):
     format: Format = None
     formatted_body: str = None
 
-    def set_reply(
-        self,
-        reply_to: Union["MessageEvent", EventID],
-        *,
-        displayname: Optional[str] = None,
-        disable_fallback: bool = False,
-    ) -> None:
-        super().set_reply(reply_to)
-        if isinstance(reply_to, str):
-            return
-        if isinstance(reply_to, MessageEvent) and not disable_fallback:
-            self.ensure_has_html()
-            if isinstance(reply_to.content, TextMessageEventContent):
-                reply_to.content.trim_reply_fallback()
-            self.formatted_body = (
-                reply_to.make_reply_fallback_html(displayname) + self.formatted_body
-            )
-            self.body = reply_to.make_reply_fallback_text(displayname) + self.body
-
     def ensure_has_html(self) -> None:
         if not self.formatted_body or self.format != Format.HTML:
             self.format = Format.HTML
@@ -424,36 +405,3 @@ def deserialize_content(data: JSON) -> MessageEventContent:
             return LocationMessageEventContent.deserialize(data)
         else:
             return Obj(**data)
-
-    def make_reply_fallback_html(self, displayname: Optional[str] = None) -> str:
-        """Generate the HTML fallback for messages replying to this event."""
-        if self.content.msgtype.is_text:
-            body = self.content.formatted_body or escape(self.content.body).replace("\n", "<br/>")
-        else:
-            sent_type = media_reply_fallback_body_map[self.content.msgtype] or "a message"
-            body = f"sent {sent_type}"
-        displayname = escape(displayname) if displayname else self.sender
-        return html_reply_fallback_format.format(
-            room_id=self.room_id,
-            event_id=self.event_id,
-            sender=self.sender,
-            displayname=displayname,
-            content=body,
-        )
-
-    def make_reply_fallback_text(self, displayname: Optional[str] = None) -> str:
-        """Generate the plaintext fallback for messages replying to this event."""
-        if self.content.msgtype.is_text:
-            body = self.content.body
-        else:
-            try:
-                body = media_reply_fallback_body_map[self.content.msgtype]
-            except KeyError:
-                body = "an unknown message type"
-        lines = body.strip().split("\n")
-        first_line, lines = lines[0], lines[1:]
-        fallback_text = f"> <{displayname or self.sender}> {first_line}"
-        for line in lines:
-            fallback_text += f"\n> {line}"
-        fallback_text += "\n\n"
-        return fallback_text