Remove check-dns-v2 command

Author: ransinha1989

src/azure-cli/azure/cli/command_modules/network/aaz/latest/network/traffic_manager/profile/__init__.py

@@ -10,7 +10,6 @@
 
 from .__cmd_group import *
 from ._check_dns import *
-from ._check_dns_v2 import *
 from ._create import *
 from ._delete import *
 from ._list import *