[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

setup.py

@@ -1,15 +1,7 @@
 #!/usr/bin/env python3
-import sys
 
 from setuptools import setup
 
-if sys.version_info < (3, 8):
-    errstr = "khal only supports python version 3.8+. Please Upgrade.\n"
-    sys.stderr.write("#" * len(errstr) + '\n')
-    sys.stderr.write(errstr)
-    sys.stderr.write("#" * len(errstr) + '\n')
-    sys.exit(1)
-
 requirements = [
     'click>=3.2',
     'click_log>=0.2.0',