fix: remove test command from setup.py

Has been deprecated for 5+ years and has been removed in recent
setuptools versions.

See pypa/setuptools#4519

setup.py

@@ -4,8 +4,6 @@
 import sys
 
 from setuptools import find_packages, setup, Command
-from setuptools.command.test import test as TestCommand
-
 
 long_description = '''
 The optimal binning is the optimal discretization of a variable into bins
@@ -34,20 +32,6 @@ def run(self):
         os.system('rm -vrf ./build ./dist ./*.pyc ./*.tgz ./*.egg-info')
 
 
-# test suites
-class PyTest(TestCommand):
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = []
-        self.test_suite = []
-
-    def run_tests(self):
-        # import here, because outside the eggs aren't loaded
-        import pytest
-        errcode = pytest.main(self.test_args)
-        sys.exit(errcode)
-
-
 # install requirements
 install_requires = [
     'matplotlib',
@@ -89,7 +73,7 @@ def run_tests(self):
     include_package_data=True,
     license="Apache Licence 2.0",
     url="https://github.com/guillermo-navas-palencia/optbinning",
-    cmdclass={'clean': CleanCommand, 'test': PyTest},
+    cmdclass={'clean': CleanCommand},
     python_requires='>=3.7',
     install_requires=install_requires,
     tests_require=tests_require,