externals cleanup

[juliantaylor]

I had a brief look through the bundled externals.
I noticed that pyparsing does not appear to be used at all and mglob is only used in death-row or quarantined stuff (ipy_fsops.py, ipy_profile_sh.py)

So the pyparsing should be removed an if quarantine and death-row cleanup is planned for 0.13 also mglob.

also docs/source/interactive/shell.txt mentions a mglob magic which does not appear to exist anymore.

[fperez]

This all sounds very reasonable, any chance you could whip up a PR for it? I'd be OK with removing externals that are only used in quarantine/deathrow, but I'd want to add a quick comment in the user file to the effect of:

This depends on foo.bar that used to be in externals, if this code is updated to run again with current IPython, you may need to reintroduce that file back. In doing so, look for the possibility of achieving the same effect only with the standard library (which may have improved by now, since we currently depend on Python 2.6).

[juliantaylor]

which user file?

[fperez]

Sorry, bad writing: I meant whatever quarantine file may have been using the removed code.

[takluyver]

Closed by PR #1839