scx.cscheds: direct use of bash

(cherry picked from commit 594f4924de)

pkgs/os-specific/linux/scx/scx_cscheds.nix

@@ -17,15 +17,6 @@
   libseccomp,
 }:
 
-let
-  # Fixes a bug with the meson build script where it specifies
-  # /bin/bash twice in the script
-  misbehaviorBash = writeShellScript "bash" ''
-    shift 1
-    exec ${lib.getExe bash} "$@"
-  '';
-
-in
 llvmPackages.stdenv.mkDerivation (finalAttrs: {
   pname = "scx_cscheds";
   inherit (scx-common) version src;
@@ -66,7 +57,7 @@ llvmPackages.stdenv.mkDerivation (finalAttrs: {
     cp ${finalAttrs.fetchBpftool} meson-scripts/fetch_bpftool
     cp ${finalAttrs.fetchLibbpf} meson-scripts/fetch_libbpf
     substituteInPlace meson.build \
-      --replace-fail '[build_bpftool' "['${misbehaviorBash}', build_bpftool"
+      --replace-fail '[build_bpftool' "['${lib.getExe bash}', build_bpftool"
 
     # TODO: Remove in next release.
     substituteInPlace lib/scxtest/overrides.h \