fixed a few pylint warnings

httping.py

@@ -17,7 +17,7 @@ from __future__ import annotations
 import datetime  # for the whole ms → s and vice versa stuff
 import statistics  # for median and stdev
 import sys  # for redirecting print to stderr
-from typing import Generic, List, Sequence, TypeVar, Optional, Tuple, Dict, Union
+from typing import Dict, List, Optional, Tuple
 
 import requests  # for the central HTTP HEAD request
 
@@ -30,7 +30,6 @@ __maintainer__ = "Tobias Schmidl"
 MAX_PING: datetime.timedelta = datetime.timedelta(milliseconds=1000)  # in seconds
 TARGETS: List[str] = ["https://www.google.de", "https://www.bing.com", "https://www.wikipedia.org"]
 
-T = TypeVar('T')
 Bucket = Tuple[int, int]
 BucketList = List[Bucket]