Revert "onnxruntime,python3.pkgs.onnxruntime: fix runtime w/ glibc-2.42"

The proper fix is included in 1.23.1, which will land in master with
https://github.com/NixOS/nixpkgs/pull/450587, causing conflicts unless
this is reverted.

This reverts commit b706c583d0.

pkgs/by-name/on/onnxruntime/package.nix

@@ -264,10 +264,7 @@ effectiveStdenv.mkDerivation rec {
     (lib.cmakeBool "onnxruntime_USE_COMPOSABLE_KERNEL_CK_TILE" false)
   ];
 
-  env = {
-    NIX_LDFLAGS = "-z,noexecstack";
-  }
-  // lib.optionalAttrs rocmSupport {
+  env = lib.optionalAttrs rocmSupport {
     MIOPEN_PATH = rocmPackages.miopen;
     # HIP steps fail to find ROCm libs when not in HIPFLAGS, causing
     # fatal error: 'rocrand/rocrand.h' file not found

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

@@ -38,10 +38,6 @@ buildPythonPackage {
     chmod +w dist
   '';
 
-  env = {
-    NIX_LDFLAGS = "-z,noexecstack";
-  };
-
   nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   # This project requires fairly large dependencies such as sympy which we really don't always need.