how to disable delete option or symbol in attachment control in infopath 2010

Any have any idea how to disable the delete option or symbol near the attached file using attachment control in infopath 2010.
 
I have created a custom list in sharepoint online 2013(Office 365) and customized it in  Infopath forms 2010 
i want tht user can attach the files using attachment control but not to allow to delete other attached files.
 
plzzzzzz help me out :( .