Remove deprecated setuptools-tox integration

setup.py

@@ -1,40 +1,4 @@
 from setuptools import setup, find_packages
-from setuptools.command.test import test as TestCommand
-import sys
-
-
-class Tox(TestCommand):
-    """ Running tox from setup.py.
-    See:
-    https://testrun.org/tox/latest/example/basic.html#integration-with-setuptools-distribute-test-commands
-    """
-    user_options = [('tox-args=', 'a', "Arguments to pass to tox")]
-
-    def __init__(self, dist, **kw):
-        TestCommand.__init__(self, dist, **kw)
-        self.tox_args = None
-        self.test_args = []
-        self.test_suite = True
-
-    def initialize_options(self):
-        TestCommand.initialize_options(self)
-        self.tox_args = None
-
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = []
-        self.test_suite = True
-
-    def run_tests(self):
-        # import here, cause outside the eggs aren't loaded
-        import tox
-        import shlex
-
-        args = self.tox_args
-        if args:
-            args = shlex.split(self.tox_args)
-        errno = tox.cmdline(args=args)
-        sys.exit(errno)
 
 
 for line in open('httpagentparser/__init__.py'):
@@ -56,8 +20,4 @@ def run_tests(self):
     author='Shekhar Tiwatne',
     author_email='pythonic@gmail.com',
     license="http://www.opensource.org/licenses/mit-license.php",
-    test_suite="tests",
-    tests_require=['tox'],
-    cmdclass={'test': Tox},
     )
-