Network module cleanup (#17334)

* Clean up EOS, IOS, IOS-XR, Junos, NX-OS, and OpenSwitch

* Cleanup net* files

* Re-add NetworkModule import to network module_utils files

This will trick modules into importing code from module_utils code, thus
including it in the final Ansiballz zipfile.

* Give asa a look over, too

lib/ansible/module_utils/asa.py

@@ -29,7 +29,7 @@
 
 import re
 
-from ansible.module_utils.network import NetworkModule, NetworkError
+from ansible.module_utils.network import NetworkError, NetworkModule
 from ansible.module_utils.network import add_argument, register_transport, to_list
 from ansible.module_utils.shell import CliBase
 from ansible.module_utils.netcli import Command
@@ -72,11 +72,6 @@ class Cli(CliBase):
         cmd = Command('enable', prompt=self.NET_PASSWD_RE, response=passwd)
         self.execute([cmd, 'no terminal pager'])
 
-    ### Cli methods ###
-
-    def run_commands(self, commands):
-        return self.execute(to_list(commands))
-
     def change_context(self, params, **kwargs):
         context = params['context']
         if context == 'system':