I think these are probably the main bits they wanted to remove (both Article I section 9):

• The Privilege of the Writ of Habeas Corpus shall not be suspended, unless when in Cases of Rebellion or Invasion the public Safety may require it.
• No Bill of Attainder or ex post facto Law shall be passed.
• No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law; and a regular Statement and Account of the Receipts and Expenditures of all public Money shall be published from time to time.

Pure speculation to be clear, but they removed only the end of section 8, and probably removed section 10 because it would have to be numbered differently. Habeas Corpus has been causing them trouble, they’ve been stealing money pretty blatantly already, and bill of attainder/ex post facto laws seem convenient to them.

Also, habeas corpus is gone?

They can, but it’s not trivial. The challenge uses a bunch of modern browser features that these scrapers don’t use, regarding metadata and compression and a few other things. Things that are annoying to implement and not worth the effort. Check the recent discussion on lobste.rs if you’re interested in the exact details.