pkg: remove unneeded pytest-runner from setup requires

fixes #895

Author: wagner-intevation

setup.py

@@ -97,7 +97,6 @@ def list_modules(dirname):
     packages=["hug"],
     requires=["falcon", "requests"],
     install_requires=["falcon==2.0.0", "requests"],
-    setup_requires=["pytest-runner"],
     tests_require=["pytest", "marshmallow"],
     ext_modules=ext_modules,
     cmdclass=cmdclass,