Migrate "User.SearchWithoutTeam" to Sync by default (#11421)

app/user.go

@@ -1770,11 +1770,10 @@ func (a *App) SearchUsersNotInTeam(notInTeamId string, term string, options *mod
 
 func (a *App) SearchUsersWithoutTeam(term string, options *model.UserSearchOptions) ([]*model.User, *model.AppError) {
 	term = strings.TrimSpace(term)
-	result := <-a.Srv.Store.User().SearchWithoutTeam(term, options)
-	if result.Err != nil {
-		return nil, result.Err
+	users, err := a.Srv.Store.User().SearchWithoutTeam(term, options)
+	if err != nil {
+		return nil, err
 	}
-	users := result.Data.([]*model.User)
 
 	for _, user := range users {
 		a.SanitizeProfile(user, options.IsAdmin)