{AppService} Fix linter error in _github_oauth.py

[jiasli]

Description

For unknown reason, Pylint 2.3.0 fails to find linter errors in _github_oauth.py added by #17826.

After bumping Pylint 2.8.0 (#17861), those errors are revealed.

https://dev.azure.com/azure-sdk/public/_build/results?buildId=880573&view=logs&j=36dd4138-4d53-5e46-00d9-e5cd9744be05&t=1cf3879c-0a42-5ccd-7693-7a4781d739d8&l=107

src/azure-cli/azure/cli/command_modules/appservice/_github_oauth.py:20:28: W0613: Unused argument 'cmd' (unused-argument)

[yonzhan]

AppService

[evelyn-ys]

How about remove cmd parameter directly? As far as I know, custom function is allowed to not contain cmd according to

azure-cli/src/azure-cli-core/azure/cli/core/__init__.py

Lines 807 to 824 in 32d2691

	def default_command_handler(command_args):
	from azure.cli.core.util import get_arg_list, augment_no_wait_handler_args
	from azure.cli.core.commands.client_factory import resolve_client_arg_name
	op = handler or self.get_op_handler(operation, operation_group=kwargs.get('operation_group'))
	op_args = get_arg_list(op)
	cmd = command_args.get('cmd') if 'cmd' in op_args else command_args.pop('cmd')
	client = client_factory(cmd.cli_ctx, command_args) if client_factory else None
	supports_no_wait = kwargs.get('supports_no_wait', None)
	if supports_no_wait:
	no_wait_enabled = command_args.pop('no_wait', False)
	augment_no_wait_handler_args(no_wait_enabled, op, command_args)
	if client:
	client_arg_name = resolve_client_arg_name(operation, kwargs)
	if client_arg_name in op_args:
	command_args[client_arg_name] = client
	return op(**command_args)

L813 will process smartly

[jiasli]

This get_github_access_token is not used anywhere. Leave it to the author @calvinsID to further decide.

[evelyn-ys]

LGTM in general