systemd-cryptsetup-generator: remove

This package previously did override the systemd package, and instructed
ninja, systemd's previous build system, to only build the
cryptsetup-specific systemd generators (plus some manual rpath
massaging, as ninja install wasn't used).

Afterwards, users were expected to add this package to their
`systemd.generator-packages` (or since
https://github.com/NixOS/nixpkgs/pull/65376/files `systemd.packages`)
NixOS module options, so systemd will use these generators.

As the previous commit added cryptsetup support directly to the systemd
package (and pkgs.systemd now already ships the cryptsetup generators),
we don't need another package shipping the same generators.

pkgs/os-specific/linux/systemd/cryptsetup-generator.nix

@@ -1,34 +0,0 @@
-{ systemd, cryptsetup }:
-
-systemd.overrideAttrs (p: {
-  version = p.version;
-  name = "systemd-cryptsetup-generator-${p.version}";
-
-  buildInputs = p.buildInputs ++ [ cryptsetup ];
-  outputs = [ "out" ];
-
-  buildPhase = ''
-    ninja systemd-cryptsetup systemd-cryptsetup-generator
-  '';
-
-  # As ninja install is not used here, the rpath needs to be manually fixed.
-  # Otherwise the resulting binary doesn't properly link against systemd-shared.so
-  postFixup = ''
-    for prog in `find $out -type f -executable`; do
-      (patchelf --print-needed $prog | grep 'libsystemd-shared-.*\.so' > /dev/null) && (
-        patchelf --set-rpath `patchelf --print-rpath $prog`:"$out/lib/systemd" $prog
-      ) || true
-    done
-    # test it's OK
-    "$out"/lib/systemd/systemd-cryptsetup
-  '';
-
-  installPhase = ''
-    mkdir -p $out/lib/systemd/
-    cp systemd-cryptsetup $out/lib/systemd/systemd-cryptsetup
-    cp src/shared/*.so $out/lib/systemd/
-
-    mkdir -p $out/lib/systemd/system-generators/
-    cp systemd-cryptsetup-generator $out/lib/systemd/system-generators/systemd-cryptsetup-generator
-  '';
-})