code: async def deletereaction(self, ctx, *, reactor : str):
          
          data = self.config.get(ctx.message.server.id, {})
          keyword = data.get(reactor, {})
          if keyword:
              data.pop(reactor)
              await self.config.put(ctx.message.server.id, data)
              await self.bot.responses.success(message="Reaction '{}' has been deleted.".format(reactor))
          else:
              await self.bot.responses.failure(message="Reaction '{}' was not found.".format(reactor))
docs: Removes a reaction