ssh(1) on OpenBSD doesn't support GSSAPI

Index: salt/client/ssh/shell.py
--- salt/client/ssh/shell.py.orig
+++ salt/client/ssh/shell.py
@@ -127,8 +127,6 @@ class Shell:
             options.append("PasswordAuthentication=yes")
         else:
             options.append("PasswordAuthentication=no")
-        if self.opts.get("_ssh_version", (0,)) > (4, 9):
-            options.append("GSSAPIAuthentication=no")
         options.append("ConnectTimeout={}".format(self.timeout))
         if self.opts.get("ignore_host_keys"):
             options.append("StrictHostKeyChecking=no")
@@ -162,8 +160,6 @@ class Shell:
             "ControlMaster=auto",
             "StrictHostKeyChecking=no",
         ]
-        if self.opts["_ssh_version"] > (4, 9):
-            options.append("GSSAPIAuthentication=no")
         options.append("ConnectTimeout={}".format(self.timeout))
         if self.opts.get("ignore_host_keys"):
             options.append("StrictHostKeyChecking=no")