python3Packages.dlib: fix build
python3Packages.dlib: fix build

The CMake configuring is done in the `setup.py` and doesn't need to be
done by the setup hook. This broke the build as the setup-hook switches
into `source/build` which doesn't have a `setup.py`.

Relying on the setup script from upstream fixes the issue.

ZHF #68361

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs