Remove some SSH channel related test infrastructure (#3693)

SSH channels were removed in #3677

## Type of change

- Code maintenance/cleanup

Author: benclifford

parsl/tests/conftest.py

@@ -143,10 +143,6 @@ def pytest_configure(config):
         'markers',
         'staging_required: Marks tests that require a staging provider, when there is no sharedFS'
     )
-    config.addinivalue_line(
-        'markers',
-        'sshd_required: Marks tests that require a SSHD'
-    )
     config.addinivalue_line(
         'markers',
         'multiple_cores_required: Marks tests that require multiple cores, such as htex affinity'

test-requirements.txt

@@ -1,6 +1,5 @@
 flake8==6.1.0
 pandas
-paramiko
 pytest>=7.4.0,<8
 pytest-cov
 pytest-random-order
@@ -10,7 +9,6 @@ mypy==1.5.1
 types-mock
 types-python-dateutil
 types-requests
-types-paramiko
 mpi4py
 
 # sqlalchemy is needed for typechecking, so it's here