Have been trying to delete my online biography for years now. I do not want it online, it reveals personal details about myself I do not want shared. Why do IMDB advertise response times when they don't do anything?
Apropos, as to the main "problem" presented here, it is against IMDb policy for verifiable information to be removed from IMDb. Embarrassing or otherwise scandalous pieces of verifiable information can of course be reworded in such a way as to be respectful and objective in presentation.
Dan: If you want more detailed advice, you may need to indicate which of the 100+ "Dan Smith"s listed in IMDb you are (see https://www.imdb.com/find?q=dan%20smith&s=nm&exact=true). However, I realize that doing so might lead people to visit your page and see the biography that you don't want people to read, so that may not work for you.