gnu: Remove python-unittest2.

This package is no longer needed as per: "unittest2 is a backport of the
new features added to the unittest testing framework in Python 2.7 and
onwards.", it has no users in Guix.

* gnu/packages/check.scm (python-unittest2): Delete variable.

* gnu/local.mk (dist_patch_DATA): Deregister 2 patches.
* gnu/packages/patches/python-unittest2-python3-compat.patch: Delete file.
* gnu/packages/patches/python-unittest2-remove-argparse.patch: Likewise.

Change-Id: I7d67223cdd5a0e656a299d83ac28248d7db7c321

gnu/local.mk

@@ -2174,8 +2174,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/python-pytorch-system-libraries.patch	\
   %D%/packages/patches/python-pytorch-without-kineto.patch	\
   %D%/packages/patches/python-robotframework-sshlibrary-rf5-compat.patch \
-  %D%/packages/patches/python-unittest2-python3-compat.patch	\
-  %D%/packages/patches/python-unittest2-remove-argparse.patch	\
   %D%/packages/patches/python-vaex-core-fix-tsl-use.patch	\
   %D%/packages/patches/python-vega-datasets-remove-la-riots-code.patch	\
   %D%/packages/patches/python-versioneer-guix-support.patch	\

gnu/packages/check.scm

@@ -1557,36 +1557,6 @@ better plugin api, being easier for users to configure, and simplifying internal
 interfaces and processes.")
     (license license:bsd-2)))
 
-(define-public python-unittest2
-  (package
-    (name "python-unittest2")
-    (version "1.1.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (pypi-uri "unittest2" version))
-       (patches
-        (search-patches "python-unittest2-python3-compat.patch"
-                        "python-unittest2-remove-argparse.patch"))
-       (sha256
-        (base32
-         "0y855kmx7a8rnf81d3lh5lyxai1908xjp0laf4glwa4c8472m212"))))
-    (build-system python-build-system)
-    (arguments
-     '(#:phases
-       (modify-phases %standard-phases
-         (replace 'check
-           (lambda _
-             (zero? (system* "python" "-m" "unittest2" "discover" "--verbose")))))))
-    (propagated-inputs
-     (list python-six python-traceback2))
-    (home-page "https://pypi.org/project/unittest2/")
-    (synopsis "Python unit testing library")
-    (description
-     "Unittest2 is a replacement for the unittest module in the Python
-standard library.")
-    (license license:psfl)))
-
 (define-public python-pytest
   (package
     (name "python-pytest")

gnu/packages/patches/python-unittest2-python3-compat.patch

@@ -1,46 +0,0 @@
-Skip tests that fail with newer versions of Python.
-
-Patch copied from Gentoo:
-
-https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-python/unittest2/files/unittest2-1.1.0-python3.5-test.patch
-
-diff --git a/unittest2/test/test_loader.py b/unittest2/test/test_loader.py
-index 683f662..347eea5 100644
---- a/unittest2/test/test_loader.py
-+++ b/unittest2/test/test_loader.py
-@@ -509,6 +509,7 @@ class Test_TestLoader(unittest2.TestCase):
-     #
-     # What happens when an impossible name is given, relative to the provided
-     # `module`?
-+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
-     def test_loadTestsFromName__relative_malformed_name(self):
-         loader = unittest.TestLoader()
- 
-@@ -811,6 +812,7 @@ class Test_TestLoader(unittest2.TestCase):
-     # TestCase or TestSuite instance."
-     #
-     # What happens when presented with an impossible module name?
-+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
-     def test_loadTestsFromNames__malformed_name(self):
-         loader = unittest2.TestLoader()
- 
-@@ -918,6 +920,7 @@ class Test_TestLoader(unittest2.TestCase):
-     # "The method optionally resolves name relative to the given module"
-     #
-     # What happens when presented with an impossible attribute name?
-+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
-     def test_loadTestsFromNames__relative_malformed_name(self):
-         loader = unittest.TestLoader()
- 
-diff --git a/unittest2/compatibility.py b/unittest2/compatibility.py
-index 9e5f1a5..2d20c19 100644
---- a/unittest2/compatibility.py
-+++ b/unittest2/compatibility.py
-@@ -140,6 +140,6 @@ except ImportError:
- ###  ChainMap (helper for configparser and string.Template)
- ########################################################################
- 
--class ChainMap(collections.MutableMapping):
-+class ChainMap(collections.abc.MutableMapping):
-     ''' A ChainMap groups multiple dicts (or other mappings) together
-     to create a single, updateable view.

gnu/packages/patches/python-unittest2-remove-argparse.patch

@@ -1,11 +0,0 @@
---- a/setup.py	2017-09-12 01:22:06.273997788 +0200
-+++ b/setup.py	2017-09-12 01:22:14.297918757 +0200
-@@ -57,7 +57,7 @@
- # Both install and setup requires - because we read VERSION from within the
- # package, and the package also exports all the APIs.
- # six for compat helpers
--REQUIRES = ['argparse', 'six>=1.4', 'traceback2'],
-+REQUIRES = ['six>=1.4', 'traceback2'],
- 
- params = dict(
-     name=NAME,