[O] cleaning all the #+results from an org document

[Stephen Eglen]

Is there an easy way to delete all the #+results: blocks that have been
generated as the result of running org mode blocks?  e.g. If I have the
following chunk:

#+begin_src R 
round(runif(n=5, min=0, max=1), 3)
#+end_src

#+results:
| 0.435 |
| 0.884 |
| 0.219 |
| 0.748 |
| 0.532 |

I'd like the results table to be deleted, but not the code chunk.

Stephen