Revert "Refactored PDF & ZIP export features for images. Add reCAPTCHA or Shib...
Revert "Refactored PDF & ZIP export features for images. Add reCAPTCHA or Shib verification to thwart bots. Use derived_image JPGs from filesystem as source instead of image server. Replace rubyzip with zip_tricks for streaming. Replace prawn with hexapdf CLI for better RAM usage. Closes DDR-2252."
This reverts commit 4802e530.