code: def remove_reader(self, fd):
          " Remove read file descriptor from the event loop. "
          fd = fd_to_int(fd)
  
          if fd in self._read_fds:
              del self._read_fds[fd]
  
          self.selector.unregister(fdf remove_reader(self, fd):
          " Remove read file descriptor from the event loop. "
          fd = fd_to_int(fd)
  
          if fd in self._read_fds:
              del self._read_fds[fd]
  
          self.selector.unregister(fd)
docs: Remove read file descriptor from the event loop.