Remove the 'fresh clone' step of the release process
Remove the 'fresh clone' step of the release process

We already clean the repository in step 3. Since the big split, there
are fewer complexities in the repo that can cause problems in packaging,
and I think this step is overkill.

This is part of my effort to simplify the release procedure, as I feel
like I'm spending a lot of time cutting releases nowadays.

ipython/ipython,ipython/ipython