Start to mutualize the builddoc and remove_file action.

htdocs/core/actions_builddoc.inc.php

htdocs/core/actions_dellink.inc.php

htdocs/core/class/commonobject.class.php

htdocs/core/modules/cheque/pdf/modules_chequereceipts.php

htdocs/core/modules/facture/modules_facture.php

htdocs/core/modules/societe/modules_societe.class.php

htdocs/core/tpl/document_actions_pre_headers.tpl.php

htdocs/install/mysql/migration/3.8.0-3.9.0.sql

htdocs/install/mysql/tables/llx_societe.sql

htdocs/livraison/class/livraison.class.php

htdocs/projet/class/task.class.php

htdocs/societe/class/societe.class.php

htdocs/societe/soc.php