[bot]: remove unreferenced code

pkgs/build-support/rust/build-rust-crate.nix

@@ -187,20 +187,12 @@ let makeDeps = dependencies:
                    crateType, metadata, crateBin, finalBins,
                    extraRustcOpts, verbose, colors }:
 
-      let depsDir = lib.concatStringsSep " " dependencies;
-          completeDepsDir = lib.concatStringsSep " " completeDeps;
-          completeBuildDepsDir = lib.concatStringsSep " " completeBuildDeps;
-          deps = makeDeps dependencies;
-          optLevel = if release then 3 else 0;
+      let deps = makeDeps dependencies;
           rustcOpts =
             lib.lists.foldl' (opts: opt: opts + " " + opt)
               (if release then "-C opt-level=3" else "-C debuginfo=2")
               (["-C codegen-units=1"] ++ extraRustcOpts);
           rustcMeta = "-C metadata=${metadata} -C extra-filename=-${metadata}";
-          version_ = lib.splitString "-" crateVersion;
-          versionPre = if lib.tail version_ == [] then "" else builtins.elemAt version_ 1;
-          version = lib.splitString "." (lib.head version_);
-          authors = lib.concatStringsSep ":" crateAuthors;
       in ''
       runHook preBuild
       norm=""
@@ -348,7 +340,6 @@ crate_: lib.makeOverridable ({ rust, release, verbose, features, buildInputs, cr
   preConfigure, postConfigure, preBuild, postBuild, preInstall, postInstall }:
 
 let crate = crate_ // (lib.attrByPath [ crate_.crateName ] (attr: {}) crateOverrides crate_);
-    release_ = release;
     dependencies_ = dependencies;
     buildDependencies_ = buildDependencies;
     processedAttrs = [

pkgs/build-support/rust/carnix.nix

@@ -2,12 +2,6 @@
 { lib, buildPlatform, buildRustCrate, fetchgit }:
 let kernel = buildPlatform.parsed.kernel.name;
     abi = buildPlatform.parsed.abi.name;
-    include = includedFiles: src: builtins.filterSource (path: type:
-      lib.lists.any (f:
-        let p = toString (src + ("/" + f)); in
-        (path == p) || (type == "directory" && lib.strings.hasPrefix path p)
-      ) includedFiles
-    ) src;
     updateFeatures = f: up: functions: builtins.deepSeq f (lib.lists.foldl' (features: fun: fun features) (lib.attrsets.recursiveUpdate f up) functions);
     mapFeatures = features: map (fun: fun { features = features; });
     mkFeatures = feat: lib.lists.foldl (features: featureName:

pkgs/build-support/rust/default.nix

@@ -20,8 +20,6 @@ in
 assert cargoVendorDir == null -> cargoSha256 != "unset";
 
 let
-  lib = stdenv.lib;
-
   cargoDeps = if cargoVendorDir == null
     then fetchcargo {
         inherit name src srcs sourceRoot cargoUpdateHook;