def delete_disk(self, disk_name, delete_vhd=False):
        '''
        Deletes the specified data or operating system disk from your image
        repository.

        disk_name:
            The name of the disk to delete.
        delete_vhd:
            Deletes the underlying vhd blob in Azure storage.
        '''
        _validate_not_none('disk_name', disk_name)
        path = self._get_disk_path(disk_name)
        if delete_vhd:
            path += '?comp=media'
        return self._perform_delete(path)
Deletes the specified data or operating system disk from your image
        repository.

        disk_name:
            The name of the disk to delete.
        delete_vhd:
            Deletes the underlying vhd blob in Azure storage.