move lipo wrapper

macos/scripts/lipo

@@ -1,15 +0,0 @@
-#!/bin/sh
-# Workaround for NixOS/nixpkgs#405066: frameworks copied from the Nix store
-# stay read-only, so lipo can't write its temporary output file when Flutter
-# thins FlutterMacOS.framework during the build. Make the framework writable
-# before delegating to the real lipo.
-for arg in "$@"; do
-  case "$arg" in
-    */*.framework/*)
-      fw_dir="${arg%.framework/*}.framework"
-      chmod -R +w "$fw_dir" 2>/dev/null
-      ;;
-  esac
-done
-
-exec /usr/bin/lipo "$@"