Remove unnecessary test deps.

--- cairocffi-1.0.2/setup.cfg
+++ cairocffi-1.0.2/setup.cfg
@@ -36,16 +36,10 @@
 packages = find:
 setup_requires = 
 	cffi >= 1.1.0
-	pytest-runner
 	setuptools
 install_requires = 
 	cffi >= 1.1.0
 	setuptools >= 39.2.0
-tests_require = 
-	pytest-cov
-	pytest-flake8
-	pytest-isort
-	pytest-runner
 python_requires = >= 3.5
 
 [options.package_data]
@@ -58,11 +52,6 @@
 doc = 
 	sphinx
 	sphinx_rtd_theme
-test = 
-	pytest-runner
-	pytest-cov
-	pytest-flake8
-	pytest-isort
 xcb = 
 	xcffib >= 0.3.2
 
@@ -74,7 +63,6 @@
 test = pytest
 
 [tool:pytest]
-addopts = --flake8 --isort
 norecursedirs = build dist .cache .eggs .git
 
 [flake8]