bintools-wrapper: remove redundant arg

This is a manual cherry-pick of:

NixOS@764b227

… only because I was unable to fetch the original commit using `git`

Author: Gabriella439

pkgs/build-support/bintools-wrapper/default.nix

@@ -250,7 +250,7 @@ stdenv.mkDerivation {
 
     + optionalString stdenv.targetPlatform.isMacOS ''
       # Ensure consistent LC_VERSION_MIN_MACOSX and remove LC_UUID.
-      echo "-macosx_version_min 10.12 -sdk_version 10.12 -no_uuid" >> $out/nix-support/libc-ldflags-before
+      echo "-sdk_version 10.12 -no_uuid" >> $out/nix-support/libc-ldflags-before
     ''
 
     + optionalString (!nativeTools) ''