slippy: useFetchCargoVendor

Cargo 1.84.0 seems to have changed the output format of cargo vendor
again, once again invalidating fetchCargoTarball FOD hashes.  It's
time to fix this once and for all, switching across the board to
fetchCargoVendor, which is not dependent on cargo vendor's output
format.

fetchCargoVendor should resolve the case sensitivity issues previously
affecting the cargoHash.

pkgs/by-name/sl/slippy/package.nix

@@ -2,8 +2,6 @@
   lib,
   rustPlatform,
   fetchFromGitHub,
-  jq,
-  moreutils,
   pkg-config,
   openssl,
   stdenv,
@@ -21,28 +19,8 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-7Uvo5+saxwTMQjfDliyOYC6j6LbpMf/FiONfX38xepI=";
   };
 
-  cargoHash = "sha256-6nB+rHBJU9qhA7azz2ynaBw1UJdwE+T7pgpoPzhD5Bk=";
-
-  # the dependency css-minify contains both README.md and Readme.md,
-  # which causes a hash mismatch on systems with a case-insensitive filesystem
-  # this removes the readme files and updates cargo's checksum file accordingly
-  depsExtraArgs = {
-    nativeBuildInputs = [
-      jq
-      moreutils
-    ];
-
-    postBuild = ''
-      pushd $name/css-minify
-
-      rm -f README.md Readme.md
-      jq 'del(.files."README.md") | del(.files."Readme.md")' \
-        .cargo-checksum.json -c \
-        | sponge .cargo-checksum.json
-
-      popd
-    '';
-  };
+  useFetchCargoVendor = true;
+  cargoHash = "sha256-RGSc+jy2i97QZGfafe3M25bunBmCYAJ0UW3dAnvl5gs=";
 
   nativeBuildInputs = [
     pkg-config