def delete_reaction(user, reaction)
      reaction = reaction.to_reaction if reaction.respond_to?(:to_reaction)
      API::Channel.delete_user_reaction(@bot.token, @channel.id, @id, reaction, user.resolve_id)
    end
def delete_reaction(user, reaction)
      reaction = reaction.to_reaction if reaction.respond_to?(:to_reaction)
      API::Channel.delete_user_reaction(@bot.token, @channel.id, @id, reaction, user.resolve_id)
    end
Deletes a reaction made by a user on this message.
 @param user [User, #resolve_id] the user who used this reaction
 @param reaction [String, #to_reaction] the reaction to remove