Depublishing some app layer methods (#29559)

* Depublishing some app layer methods

* Fixing errors

* Addressing PR review comment

* Using goimports formatting now

server/channels/app/team.go

@@ -496,7 +496,7 @@ func (a *App) UpdateTeamMemberSchemeRoles(c request.CTX, teamID string, userID s
 
 	// If the migration is not completed, we also need to check the default team_admin/team_user roles are not present in the roles field.
 	if err = a.IsPhase2MigrationCompleted(); err != nil {
-		member.ExplicitRoles = RemoveRoles([]string{model.TeamGuestRoleId, model.TeamUserRoleId, model.TeamAdminRoleId}, member.ExplicitRoles)
+		member.ExplicitRoles = removeRoles([]string{model.TeamGuestRoleId, model.TeamUserRoleId, model.TeamAdminRoleId}, member.ExplicitRoles)
 	}
 
 	member, nErr := a.Srv().Store().Team().UpdateMember(c, member)
@@ -1096,12 +1096,11 @@ func (a *App) AddTeamMemberByInviteId(c request.CTX, inviteId, userID string) (*
 
 func (a *App) GetTeamUnread(teamID, userID string) (*model.TeamUnread, *model.AppError) {
 	channelUnreads, err := a.Srv().Store().Team().GetChannelUnreadsForTeam(teamID, userID)
-
 	if err != nil {
 		return nil, model.NewAppError("GetTeamUnread", "app.team.get_unread.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
 	}
 
-	var teamUnread = &model.TeamUnread{
+	teamUnread := &model.TeamUnread{
 		MsgCount:         0,
 		MentionCount:     0,
 		MentionCountRoot: 0,