Remove team field of Announcement
Remove team field of Announcement

It was necessary before in case the author of the announcement was kicked off the team and the announcement was an all-team announcement. Now, it is not necessary because the group contains all the necessary information.

Farbod909/Expressiment,Farbod909/Expressiment,Farbod909/MorTeam-server-website,Farbod909/MorTeam-server-website