code: func (r Network_Storage) DeleteFile(fileId *string) (resp bool, err error) {
  	params := []interface{}{
  		fileId,
  	}
  	err = r.Session.DoRequest("SoftLayer_Network_Storage", "deleteFile", params, &r.Options, &resp)
  	return
  }
docs: // {{CloudLayerOnlyMethod}} Delete an individual file within a Storage account. Depending on the type of Storage account, Deleting a file either deletes the file permanently or sends the file to your account's recycle bin.
  //
  // Currently, Virtual Server storage is the only type of Storage account that sends files to a recycle bin when deleted. When called against a Virtual Server storage account , this method also determines if the file is in the account's recycle bin. If the file exist in the recycle bin, then it is permanently deleted.
  //
  // Please note, a file can not be restored once it is permanently deleted.