clasp-common-lisp: fix build warning

This resolves the annoying message for every compilation line:

```
clang-15: warning: argument unused during compilation: '-stdlib=libstdc++' [-Wunused-command-line-argument]
```

Changed files
+14
pkgs
+1
pkgs/development/compilers/clasp/default.nix
···
patches = [
./clasp-pin-repos-commits.patch
+
./remove-unused-command-line-argument.patch
];
nativeBuildInputs = [
+13
pkgs/development/compilers/clasp/remove-unused-command-line-argument.patch
···
+
diff --git a/src/koga/units.lisp b/src/koga/units.lisp
+
index 808cebd17..2bbf965fd 100644
+
--- a/src/koga/units.lisp
+
+++ b/src/koga/units.lisp
+
@@ -197,7 +197,7 @@
+
:type :cxxflags)
+
#+darwin (append-cflags configuration "-stdlib=libc++" :type :cxxflags)
+
#+darwin (append-cflags configuration "-I/usr/local/include")
+
- #+linux (append-cflags configuration "-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fno-stack-protector -stdlib=libstdc++"
+
+ #+linux (append-cflags configuration "-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fno-stack-protector"
+
:type :cxxflags)
+
#+linux (append-cflags configuration "-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fno-stack-protector"
+
:type :cflags)