Remove team unreads and rely on channel member instead (#5710)

app/database/models/server/my_team.ts

@@ -18,12 +18,6 @@ export default class MyTeamModel extends Model {
     /** table (name) : MyTeam */
     static table = MY_TEAM;
 
-    /** is_unread : Boolean flag for unread messages on team level */
-    @field('is_unread') isUnread!: boolean;
-
-    /** mentions_count : Count of posts in which the user has been mentioned */
-    @field('mentions_count') mentionsCount!: number;
-
     /** roles : The different permissions that this user has in the team, concatenated together with comma to form a single string. */
     @field('roles') roles!: string;