Remove non-existent packages from `extern/__init__.py` docstring
@@ -4,12 +4,6 @@ This package contains `extern` code, i.e. code that we just copied
here into the `gammapy.extern` package, because we wanted to use it,
but not have an extra dependency (these are single-file external packages).
-Alphabetical order:
-
* ``xmltodict.py`` for easily converting XML from / to Python dicts
Origin: https://github.com/martinblech/xmltodict/blob/master/xmltodict.py
-* ``zeros.py`` - Modified copy of the file from ``scipy.optimize``,
- used by the TS map computation code.
-* ``skimage.py`` - utility functions copied from scikit-image
- They have the same BSD license as we do.
"""
