Remove unused pytest dependency and remove nosetest from Travis conf

Author: Burak Yigit Kaya

.travis.yml

@@ -5,4 +5,4 @@ python:
   - "3.4"
   - "3.5"
 install: "pip install ."
-script: nosetests
+script: "python phabricator/tests.py"

setup.py

@@ -4,7 +4,7 @@
 
 from setuptools import setup, find_packages
 
-tests_requires = ['pytest']
+tests_requires = []
 
 if sys.version_info[:2] < (2, 7):
     tests_requires.append('unittest2')