Remove PartialMessage.edit duplicated code

Now that Message.edit returns the message this duplication is no longer
needed.

discord/message.py

@@ -1636,6 +1636,7 @@ class PartialMessage(Hashable):
     __slots__ = ('channel', 'id', '_cs_guild', '_state')
 
     jump_url: str = Message.jump_url  # type: ignore
+    edit = Message.edit
     delete = Message.delete
     publish = Message.publish
     pin = Message.pin
@@ -1707,123 +1708,3 @@ class PartialMessage(Hashable):
 
         data = await self._state.http.get_message(self.channel.id, self.id)
         return self._state.create_message(channel=self.channel, data=data)
-
-    async def edit(self, **fields: Any) -> Optional[Message]:
-        """|coro|
-
-        Edits the message.
-
-        The content must be able to be transformed into a string via ``str(content)``.
-
-        .. versionchanged:: 1.7
-            :class:`discord.Message` is returned instead of ``None`` if an edit took place.
-
-        Parameters
-        -----------
-        content: Optional[:class:`str`]
-            The new content to replace the message with.
-            Could be ``None`` to remove the content.
-        embed: Optional[:class:`Embed`]
-            The new embed to replace the original with.
-            Could be ``None`` to remove the embed.
-        suppress: :class:`bool`
-            Whether to suppress embeds for the message. This removes
-            all the embeds if set to ``True``. If set to ``False``
-            this brings the embeds back if they were suppressed.
-            Using this parameter requires :attr:`~.Permissions.manage_messages`.
-        delete_after: Optional[:class:`float`]
-            If provided, the number of seconds to wait in the background
-            before deleting the message we just edited. If the deletion fails,
-            then it is silently ignored.
-        allowed_mentions: Optional[:class:`~discord.AllowedMentions`]
-            Controls the mentions being processed in this message. If this is
-            passed, then the object is merged with :attr:`~discord.Client.allowed_mentions`.
-            The merging behaviour only overrides attributes that have been explicitly passed
-            to the object, otherwise it uses the attributes set in :attr:`~discord.Client.allowed_mentions`.
-            If no object is passed at all then the defaults given by :attr:`~discord.Client.allowed_mentions`
-            are used instead.
-        view: Optional[:class:`~discord.ui.View`]
-            The updated view to update this message with. If ``None`` is passed then
-            the view is removed.
-
-            .. versionadded:: 2.0
-
-        Raises
-        -------
-        NotFound
-            The message was not found.
-        HTTPException
-            Editing the message failed.
-        Forbidden
-            Tried to suppress a message without permissions or
-            edited a message's content or embed that isn't yours.
-
-        Returns
-        ---------
-        Optional[:class:`Message`]
-            The message that was edited.
-        """
-
-        try:
-            content = fields['content']
-        except KeyError:
-            pass
-        else:
-            if content is not None:
-                fields['content'] = str(content)
-
-        try:
-            embed = fields['embed']
-        except KeyError:
-            pass
-        else:
-            if embed is not None:
-                fields['embed'] = embed.to_dict()
-
-        try:
-            suppress: bool = fields.pop('suppress')
-        except KeyError:
-            pass
-        else:
-            flags = MessageFlags._from_value(0)
-            flags.suppress_embeds = suppress
-            fields['flags'] = flags.value
-
-        delete_after = fields.pop('delete_after', None)
-
-        try:
-            allowed_mentions = fields.pop('allowed_mentions')
-        except KeyError:
-            pass
-        else:
-            if allowed_mentions is not None:
-                if self._state.allowed_mentions is not None:
-                    allowed_mentions = self._state.allowed_mentions.merge(allowed_mentions).to_dict()
-                else:
-                    allowed_mentions = allowed_mentions.to_dict()
-                fields['allowed_mentions'] = allowed_mentions
-
-        try:
-            view = fields.pop('view')
-        except KeyError:
-            # To check for the view afterwards
-            view = None
-        else:
-            self._state.prevent_view_updates_for(self.id)
-            if view:
-                fields['components'] = view.to_components()
-            else:
-                fields['components'] = []
-
-        if fields:
-            data = await self._state.http.edit_message(self.channel.id, self.id, **fields)
-
-        if delete_after is not None:
-            await self.delete(delay=delete_after)
-
-        if fields:
-            # data isn't unbound
-            msg = self._state.create_message(channel=self.channel, data=data)  # type: ignore
-            if view and not view.is_finished():
-                self._state.store_view(view, self.id)
-            return msg