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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def strip_system_metadata(etree_obj):
 """In-place remove elements and attributes that are only valid in v2 types from v1 System Metadata. Args: etree_obj: ElementTree ElementTree holding a v1 SystemMetadata. """

    for series_id_el in etree_obj.findall('seriesId'):
        etree_obj.remove(series_id_el)
    for media_type_el in etree_obj.findall('mediaType'):
        etree_obj.remove(media_type_el)
    for file_name_el in etree_obj.findall('fileName'):
        etree_obj.remove(file_name_el)