Removing attachments from messages

The messaging framework allows you to remove attachments from messages.

1. Get the details of the message to which you want to add an attachment using CMsvEntry::EditStoreL(). This function returns CMsvStore in writable mode.
2. Get an MMsvAttachmentManager attachment manager for the message entry, using CMsvStore::AttachmentManagerL().
3. 
   Remove an attachment using the MMsvAttachmentManager::RemoveAttachmentL() function.

   void CFoo::RemoveAttachL(TInt aNum)
       {
       ...
       
       TRequestStatus status;
       
       // Remove attachment with index aNum
       attManager.RemoveAttachmentL(aNum, status);
       
       // Wait for request to complete
       User::WaitForRequest(status);
       
       ...
       }