MM-33708 - Add MentionCountRoot column to ChannelMembers (#17099)

* added new column for root-only mentions

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/user.go

@@ -2401,14 +2401,6 @@ func (a *App) GetThreadsForUser(userID, teamID string, options model.GetUserThre
 	return threads, nil
 }
 
-func (a *App) GetThreadMentionsForUserPerChannel(userId, teamId string) (map[string]int64, *model.AppError) {
-	res, err := a.Srv().Store.Thread().GetThreadMentionsForUserPerChannel(userId, teamId)
-	if err != nil {
-		return nil, model.NewAppError("GetThreadMentionsForUserPerChannel", "app.user.get_threads_for_user.app_error", nil, err.Error(), http.StatusInternalServerError)
-	}
-	return res, nil
-}
-
 func (a *App) GetThreadForUser(userID, teamID, threadId string, extended bool) (*model.ThreadResponse, *model.AppError) {
 	thread, err := a.Srv().Store.Thread().GetThreadForUser(userID, teamID, threadId, extended)
 	if err != nil {