Alchemy.Client.remove_reaction

You're seeing just the function remove_reaction, go back to Alchemy.Client module for more information.
Link to this function

remove_reaction(message, emoji)

Specs

remove_reaction(
  Alchemy.Message.t() | {channel_id(), message_id()},
  unicode() | Alchemy.Reaction.Emoji.t()
) :: {:ok, nil} | {:error, term()}

Removes a reaction on a message, posted by this user.

This doesn't require the MANAGE_MESSAGES permission, unlike delete_reaction.

Example

Cogs.def indecisive do
Client.add_reaction(message, "❤")
Process.sleep(3000)
Client.remove_reaction(message, "❤")
end