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

pkgs/development/python-modules/dlib/default.nix

@@ -21,4 +21,7 @@ buildPythonPackage {
   '';
 
   checkInputs = [ pytest more-itertools ];
+
+  enableParallelBuilding = true;
+  dontUseCmakeConfigure = true;
 }