I got this code from a python code search engine and it looked like it was from an earlier MB tagger (classic?).

Do you want me to convert it to UTC or to get rid of it or have yet another option?

Personally I am not sure why anyone would have a problem with this - there are lots of other tags that are set by Picard. However since the timestamp is not in metadata, you cannot unset it if you don't want it like you can with other tags, so (reluctantly) perhaps we need YAFO.

>TDTG (from id3v24 standard)
   The 'Tagging time' frame contains a timestamp describing then the
   audio was tagged. Timestamp format is described in the ID3v2
   structure document [ID3v2-strct].