Fixes: guix/guix#1025
* gnu/packages/patches/python-pandas-2-no-pytz_datetime.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/python-science.scm (python-pandas-2): Use it.
Change-Id: I0e3689c28f11a5f69362caf0e31890a5efe6febe
Signed-off-by: Andreas Enge <andreas@enge.fr>