chore(audit): delete NixOS-irrelevant Omarchy port scripts

Pillar 3 Phase B, batch 2. Five `unused?` scripts that either duplicate
NixOS-native facilities or reference infrastructure Nomarchy doesn't
ship. All five had no callers anywhere in the tree.

- `nomarchy-rollback`: ran `nixos-rebuild rollback` after listing
  `snapper` snapshots. NixOS already exposes the previous generation in
  the boot menu and `nixos-rebuild --rollback`; Nomarchy uses
  impermanence, not snapper.
- `nomarchy-snapshot`: wrapped `snapper create/restore`. Same reason —
  snapper isn't part of Nomarchy. The script's "nomarchy-update can use
  this" comment never came true; nomarchy-update has no reference to it.
- `nomarchy-migrate-state`: one-time migration from old
  `~/.config/home-manager/state.json` and `/etc/nixos/state.json` to the
  unified `~/.config/nomarchy/state.json`. The installer now seeds the
  unified file directly; no current install needs the migration.
- `nomarchy-config-direct-boot`: added an EFI boot entry for a Nomarchy
  UKI. We don't build a UKI (no references anywhere in `core/` or
  `hosts/`), so the script targeted nonexistent infrastructure.
- `nomarchy-npx-install`: generated npx wrappers in `~/.local/bin/`. An
  Arch idiom — on NixOS the path is `nix-shell -p nodejs` or a
  declarative `home.packages` entry.

Kept `nomarchy-build-iso` and `nomarchy-build-live-iso` (the user-flagged
useful build wrappers) and surfaced them in README §2 in place of the
raw `nix build` command, which both removes the audit's `unused?` flag
on them and shortens the docs.

Regenerated docs/SCRIPTS.md (171 → 166 scripts; 28 `unused?` → 21).
Logged in docs/ROADMAP.md Shipped.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -121,6 +121,7 @@ Each PR description should reference the row(s) in `docs/SCRIPTS.md` it closes,
 
 (Move items here when they land — keep them brief, link the commit/PR.)
 
+- _2026-05-18_ — Pillar 3 Phase B: dead-code sweep (NixOS-irrelevant Omarchy ports). Deleted five scripts that duplicated NixOS-native facilities or referenced infrastructure Nomarchy doesn't ship: `nomarchy-rollback` (boot-menu generations + `nixos-rebuild rollback` already cover this), `nomarchy-snapshot` (used `snapper`; impermanence and BTRFS subvolumes are the Nomarchy answer), `nomarchy-migrate-state` (one-shot pre-unification migration, no current callers), `nomarchy-config-direct-boot` (added an EFI entry for a UKI we never build), and `nomarchy-npx-install` (Arch idiom — `nix-shell -p nodejs` is the NixOS path). Kept `nomarchy-build-iso` and `nomarchy-build-live-iso` and surfaced them in README §2 so the audit tags them `kept`. Script count 171 → 166.
 - _2026-05-18_ — Pillar 3 Phase B: missing-references triage. (1) Wrote `themes/engine/scripts/nomarchy-theme-next` so `SKILL.md`'s documented "cycle to next theme" command resolves; (2) scrubbed three stale `nomarchy-dev-*` references from `core/home/config/nomarchy-skill/SKILL.md`; (3) added a line-context filter to both `nomarchy-docs-scripts` generators that drops `nomarchy-*` tokens appearing in Nix `pname`/derivation idents, `/tmp/` & `/etc/sudoers.d/` paths, `nixosConfigurations.*` / `packages.*` flake outputs, `mktemp -t` prefixes, systemd unit vars, `./result/bin/run-` binaries, and `docker` container references; (4) added a small token-level denylist for five residual non-script identifiers (`nomarchy-plymouth`, `nomarchy-sddm-theme`, `nomarchy-live`, `nomarchy-rev`, `nomarchy-windows`) that survive line filtering. `docs/SCRIPTS.md` "Missing references" section is now empty (was 15).
 - _2026-05-04_ — Pillar 8: Distro Branding. (1) Scrubbed remaining "Omarchy" and "Spirit of Omarchy" references from README, scripts, and welcome wizard; (2) Updated `nomarchy-welcome` banner and `nomarchy-version` codename ("Sovereign"); (3) Verified existing `core/system/branding.nix` handles OS-release and bootloader labels; (4) Confirmed SDDM and Plymouth metadata are already Nomarchy-branded.
 - _2026-05-04_ — Thorough Out-of-the-Box QA Audit. (1) Restored automatic wallpaper switching by removing image filters from deployed themes; (2) Fixed broken "Style" menu entries by creating missing `about.txt` and `screensaver.txt` branding files; (3) Cleaned up conflicting keybindings by removing deprecated `tiling.conf` and updating the doc generator; (4) Removed legacy Nord theme hack from `nomarchy-theme-set`; (5) Fixed JSON parse error in `summer-day` waybar theme.