lint: Remove unused imports

Author: Synss

programs/server.py

@@ -12,7 +12,6 @@
 from functools import partial
 
 from mbedtls._tls import _enable_debug_output, _set_debug_level
-from mbedtls.exceptions import TLSError
 from mbedtls.tls import (
     DTLSConfiguration,
     HelloVerifyRequest,

src/mbedtls/tls.py

@@ -4,10 +4,6 @@
 import enum
 import socket as _socket
 import struct
-import sys
-from contextlib import suppress
-
-import mbedtls._ringbuf as _rb
 
 from ._tls import (
     DTLSConfiguration,