The default Skype Channel and the default WebChat Channel shouldn't created while creating BotService

After tested, I found the default Skype Channel and the default WebChat Channel would be created while creating BotService. Service team confirmed it shouldn't happen since the default channel should already have been removed. So seems this issue has to be fixed by service team.

Start by reviewing the issue report and the service team's confirmation that the default Skype and WebChat channels should already have been removed. There are no files or tests identified, and the reported fix appears to require service-team investigation rather than a change in this repository.

Written by the indexing model from the issue text.