Remove mock from requirements set.

.travis.yml

@@ -4,7 +4,7 @@ python:
 - pypy
 - 3.4
 before_install:
-- pip install nose coverage codecov mock tornado
+- pip install nose coverage codecov tornado
 install:
 - pip install -e .
 script: nosetests

setup.py

@@ -11,9 +11,6 @@ install_requires = []
 setup_requires = []
 tests_require = ['nose>=1.3,<2', 'tornado>3,<5']
 
-if sys.version_info < (3, 0):
-    tests_require.append('mock')
-
 setuptools.setup(
     name='sprockets.logging',
     version=sprockets.logging.__version__,

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py34,tornado3
+envlist = py27,py34,pypy,pypy3,tornado3
 indexserver =
     default = https://pypi.python.org/simple
 toxworkdir = build/tox
@@ -9,11 +9,9 @@ skip_missing_interpreters = true
 commands = nosetests []
 deps =
     nose
-    mock
     tornado
 
 [testenv:tornado3]
 deps =
 	nose
-	mock
 	tornado>=3,<4