faft: Remove port arg from disconnect_ssh_tunnel() and usages

Part of the android deprecation effort.

The method's "port" argument is no longer useful since
only ADBHost/android used it.

BUG=b:138222680
TEST=ran firmware_FAFTRPC.all

Change-Id: I42714703c09b6dc12c655b8f0de2d666bc5a3a14
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1872472
Commit-Queue: Oleg Loskutoff <[email protected]>
Tested-by: Oleg Loskutoff <[email protected]>
Reviewed-by: Wai-Hong Tam <[email protected]>
diff --git a/server/cros/chaos_lib/chaos_runner.py b/server/cros/chaos_lib/chaos_runner.py
index 6e563a2..a258ad7 100644
--- a/server/cros/chaos_lib/chaos_runner.py
+++ b/server/cros/chaos_lib/chaos_runner.py
@@ -268,8 +268,7 @@
                 batch_locker.unlock_aps()
 
             if webdriver_tunnel:
-                webdriver_instance.disconnect_ssh_tunnel(webdriver_tunnel,
-                                                         WEBDRIVER_PORT)
+                webdriver_instance.disconnect_ssh_tunnel(webdriver_tunnel)
                 webdriver_instance.close()
             capturer.close()
             logging.info('Powering off VM %s', webdriver_instance)
diff --git a/server/hosts/abstract_ssh.py b/server/hosts/abstract_ssh.py
index c308c50..460b77a 100644
--- a/server/hosts/abstract_ssh.py
+++ b/server/hosts/abstract_ssh.py
@@ -959,14 +959,12 @@
         return tunnel_proc
 
 
-    def disconnect_ssh_tunnel(self, tunnel_proc, port):
+    def disconnect_ssh_tunnel(self, tunnel_proc):
         """
         Disconnects a previously forwarded port from the server to the DUT for
         RPC server connection.
 
         @param tunnel_proc: a tunnel process returned from |create_ssh_tunnel|.
-        @param port: remote port on the DUT, used in ADBHost (deprecated).
-
         """
         if tunnel_proc.poll() is None:
             tunnel_proc.terminate()
diff --git a/server/hosts/rpc_server_tracker.py b/server/hosts/rpc_server_tracker.py
index feb7890..60f9bfa 100644
--- a/server/hosts/rpc_server_tracker.py
+++ b/server/hosts/rpc_server_tracker.py
@@ -295,7 +295,7 @@
                     raise error.TestError('Failed to shutdown RPC server %s' %
                                           remote_name)
 
-        self._host.disconnect_ssh_tunnel(tunnel_proc, port)
+        self._host.disconnect_ssh_tunnel(tunnel_proc)
         del self._rpc_proxy_map[port]