Remove support for setup.py test. Use the recommended test runner (setup.py ptr).

setup.py

@@ -4,7 +4,6 @@ import io
 import os
 import sys
 import textwrap
-import contextlib
 
 # Allow to run setup.py from another directory.
 os.chdir(os.path.dirname(os.path.abspath(__file__)))
@@ -27,7 +26,6 @@ with open(ver_path) as ver_file:
 
 import setuptools
 from setuptools.command.build_py import build_py as _build_py
-from setuptools.command.test import test as _test
 
 scripts = []
 
@@ -61,32 +59,6 @@ class build_py(_build_py):
                 outf, copied = self.copy_file(srcfile, target)
                 srcfile = os.path.abspath(srcfile)
 
-class test(_test):
-    """Specific test class to avoid rewriting the entry_points.txt"""
-    def run(self):
-        with self._save_entry_points():
-            _test.run(self)
-
-    @contextlib.contextmanager
-    def _save_entry_points(self):
-        entry_points = os.path.join('setuptools.egg-info', 'entry_points.txt')
-
-        if not os.path.exists(entry_points):
-            yield
-            return
-
-        # save the content
-        with open(entry_points, 'rb') as f:
-            ep_content = f.read()
-
-        # run the tests
-        try:
-            yield
-        finally:
-            # restore the file
-            with open(entry_points, 'wb') as f:
-                f.write(ep_content)
-
 
 readme_file = io.open('README.txt', encoding='utf-8')
 
@@ -116,7 +88,6 @@ setup_params = dict(
     long_description=long_description,
     keywords="CPAN PyPI distutils eggs package management",
     url="https://bitbucket.org/pypa/setuptools",
-    test_suite='setuptools.tests',
     src_root=src_root,
     packages=setuptools.find_packages(),
     package_data=package_data,
@@ -125,7 +96,6 @@ setup_params = dict(
 
     zip_safe=True,
 
-    cmdclass={'test': test},
     entry_points={
         "distutils.commands": [
             "%(cmd)s = setuptools.command.%(cmd)s:%(cmd)s" % locals()