Drop support for the deprecated "setup.py test"

Author: ylep

setup.cfg

@@ -1,2 +0,0 @@
-[aliases]
-test = pytest

setup.py

@@ -3,7 +3,6 @@
 import codecs
 import os.path
 import re
-import sys
 
 import setuptools
 
@@ -33,10 +32,6 @@ def find_version(*file_paths):
     "requests-mock",
 ]
 
-needs_pytest = {"pytest", "test", "ptr"}.intersection(sys.argv)
-pytest_runner = ["pytest-runner"] if needs_pytest else []
-
-
 setuptools.setup(
     name="neuroglancer-scripts",
     version=find_version("src", "neuroglancer_scripts", "__init__.py"),
@@ -85,7 +80,6 @@ def find_version(*file_paths):
             "tox",
         ],
     },
-    setup_requires=pytest_runner,
     tests_require=tests_require,
     entry_points={
         "console_scripts": [