[pytest][cacl] Remove unused 'testbed_devices' from parameters (sonic-net#1689)

Author: jleveque

tests/cacl/test_control_plane_acl.py

@@ -8,7 +8,7 @@
 SONIC_SSH_REGEX = 'OpenSSH_[\\w\\.]+ Debian'
 
 
-def test_control_plane_acls(duthost, localhost, testbed_devices, creds):
+def test_control_plane_acls(duthost, localhost, creds):
     """Test control plane ACL functionality on a SONiC device
     """
     dut_mgmt_ip = duthost.setup()['ansible_facts']['ansible_eth0']['ipv4']['address']