Revert "fix linting"

This reverts commit de0450b130.

prometheuspvesd/config.py

@@ -3,7 +3,6 @@
 
 import os
 from pathlib import Path, PurePath
-from typing import ClassVar
 
 import anyconfig
 import environs
@@ -21,7 +20,7 @@ cache_dir = AppDirs("prometheus-pve-sd").user_cache_dir
 default_output_file = os.path.join(cache_dir, "pve.json")
 
 
-class Config:
+class Config():
     """
     Create an object with all necessary settings.
 
@@ -31,7 +30,7 @@ class Config:
     - provides cli parameters
     """
 
-    SETTINGS: ClassVar[dict[dict]] = {
+    SETTINGS = {
         "metrics.enabled": {
             "default": True,
             "env": "METRICS_ENABLED",

prometheuspvesd/discovery.py

@@ -20,7 +20,7 @@ PROPAGATION_TIME = Summary(
 HOST_GAUGE = Gauge("pve_sd_hosts", "Number of hosts discovered by PVE SD")
 
 
-class Discovery:
+class Discovery():
     """Prometheus PVE Service Discovery."""
 
     def __init__(self):

prometheuspvesd/utils.py

@@ -2,7 +2,6 @@
 """Global utility methods and classes."""
 
 from distutils.util import strtobool
-from typing import ClassVar
 
 
 def to_bool(string):
@@ -12,7 +11,7 @@ def to_bool(string):
 class Singleton(type):
     """Meta singleton class."""
 
-    _instances: ClassVar[dict] = {}
+    _instances = {}
 
     def __call__(cls, *args, **kwargs):
         if cls not in cls._instances: