Issue #22043: time.monotonic() is now always available

threading.Lock.acquire(), threading.RLock.acquire() and socket operations now
use a monotonic clock, instead of the system clock, when a timeout is used.
diff --git a/Lib/telnetlib.py b/Lib/telnetlib.py
index 0cacac8..eebb952 100644
--- a/Lib/telnetlib.py
+++ b/Lib/telnetlib.py
@@ -36,10 +36,7 @@
 import sys
 import socket
 import selectors
-try:
-    from time import monotonic as _time
-except ImportError:
-    from time import time as _time
+from time import monotonic as _time
 
 __all__ = ["Telnet"]