format email to remove un-necessary information

HI :  Need some expert to point me to a right direction.  We are in oracle eBS 11.5.10.2  ( workflow version 2.6 ) use workflow notification mailer to send an email ( with attachment ).  We use workflow builder to define the message and add a new process.  The new process will run a procedure to do many thing but at the end it will build an email and use wf_notification.send to email to user

wf_engine.setitemattrdocument ()

wf_notification.send() 

user receives the email fine but it includes unnecessary information like "Related Applications", a grey bar and "Sono Response Delivery Attachment" message.   I don't know where to remove them.  Any help appreciate...   Below is the email