programs/cargo: remove no-longer-necessary package override

hosts/common/programs/cargo.nix

@@ -1,9 +1,10 @@
-{ pkgs, ... }:
+{ ... }:
 {
   sane.programs.cargo = {
     #v XXX(2025-02-23): normal `cargo` fails to build for cross (temporarily?). use prebuilt instead.
     # NOT easy to debug/fix. git bisect pins this between ceba2c6c3b (good) and 62a28e5a3d (bad)
-    packageUnwrapped = pkgs.rust.packages.prebuilt.cargo;
+    # packageUnwrapped = pkgs.rust.packages.prebuilt.cargo;
+
     persist.byStore.plaintext = [ ".cargo" ];
     # probably this sandboxing is too restrictive; i'm sandboxing it for rust-analyzer / neovim LSP
     sandbox.whitelistPwd = true;