I don't see any indication that pdftotext has been discontinued [1]. It looks like a Mac-specific installer available via Homebrew Cask has been discontinued [2], but pdftotext is still available through the normal poppler formula [3].

1. https://poppler.freedesktop.org/releases.html

2. https://formulae.brew.sh/cask/pdftotext

3. https://formulae.brew.sh/formula/poppler