revert, and just use < v43.0.0

requirements.txt

@@ -1,7 +1,7 @@
 atomicwrites >= 1.3.0
 beanie~=1.7
 click >=7
-cryptography >= 43.0.0
+cryptography < 43.0.0
 Deprecated == 1.2.0
 docker
 fastapi>=0.78.0

requirements_test.txt

@@ -1,5 +1,5 @@
 autopep8
-cryptography >= 43.0.0
+cryptography < 43.0.0
 pytest >= 4.0.0
 generateDS == 2.35.20
 pytest-benchmark >= 3.2.3

src/ocrd_network/runtime_data/connection_clients.py

@@ -1,13 +1,7 @@
 from __future__ import annotations
 from docker import APIClient, DockerClient
 from docker.transport import SSHHTTPAdapter
-
-# TODO: A workaround to supress the annoying paramiko
-#  warnings which fail bash lib tests  - core #1260
-from warnings import catch_warnings
-from cryptography.utils import CryptographyDeprecationWarning
-with catch_warnings(action="ignore", category=CryptographyDeprecationWarning):
-    from paramiko import AutoAddPolicy, SSHClient
+from paramiko import AutoAddPolicy, SSHClient
 
 
 class CustomDockerClient(DockerClient):