simplify test dependencies per https://github.com/Pylons/pyramid/pull/2442/...

Steve Piercy

2016-04-08 c239c4a68b41dab9d3f4477ea7de6431ec7548dd

simplify test dependencies per https://github.com/Pylons/pyramid/pull/2442/files/aa51dcc629028fda64ee83340d9b3981be7fbb29#r59052781

 docs/tutorials/wiki2/installation.rst

@@ -263,11 +263,8 @@
       'waitress',
       ]

   tests_require = [
   testing_extras = [
       'WebTest >= 1.3.1',  # py3 compat
       ]

   testing_extras = tests_require + [
       'pytest',  # includes virtualenv
       'pytest-cov',
       ]
@@ -293,7 +290,6 @@
         extras_require={
             'testing': testing_extras,
         },
         tests_require=tests_require,
         install_requires=requires,
         entry_points="""\
         [paste.app_factory]