fix(scripts): remove stale duplicate nomarchy-update

Two scripts named nomarchy-update shipped from different derivations
(core/system/scripts + features/scripts/utils), both landing on PATH so
which one ran depended on PATH ordering. The core/system one never stripped
the install-time `?rev=` pin and rebuilt a nonexistent `#default` attr,
silently keeping installs frozen instead of following rolling main. Keep the
features/scripts/utils version (unpins, queries upstream HEAD, calls
nomarchy-sys-update) and drop the stale one. Regenerated docs/SCRIPTS.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/system/scripts/nomarchy-update

@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-
-# Nomarchy Update Script
-# 1. Updates the flake inputs in the repository
-# 2. Applies system-wide NixOS changes
-# 3. Applies user-level Home Manager changes (Standalone)
-
-set -e
-
-# Detect the repository location
-if [ -f "/etc/nixos/flake.nix" ]; then
-    REPO_DIR="/etc/nixos"
-elif [ -f "/etc/nomarchy/flake.nix" ]; then
-    REPO_DIR="/etc/nomarchy"
-else
-    echo "Error: Nomarchy flake repository not found in /etc/nixos or /etc/nomarchy."
-    exit 1
-fi
-
-echo "--- Starting Nomarchy Update from $REPO_DIR ---"
-
-# 1. Update Flake Lock
-echo "Updating flake inputs..."
-sudo nix flake update --flake "$REPO_DIR"
-
-# 2. Rebuild System
-echo "Applying system-level updates..."
-sudo nixos-rebuild switch --flake "$REPO_DIR#default" --impure
-
-# 3. Rebuild Home Environment (Standalone)
-echo "Applying user-level updates..."
-home-manager switch --flake "$REPO_DIR#$USER" --impure
-
-# 4. Commit changes if it's a git repo
-if [ -d "$REPO_DIR/.git" ]; then
-    echo "Committing update to local history..."
-    sudo git -C "$REPO_DIR" add flake.lock
-    sudo git -C "$REPO_DIR" commit -m "chore: update system (flake.lock)" || echo "No lockfile changes to commit."
-fi
-
-echo "--- Nomarchy Update Complete ---"

docs/SCRIPTS.md

@@ -169,7 +169,7 @@ Phase B (per-batch PRs) refines those into `port-from-omarchy`,
 | `nomarchy-tui-remove` | `features/scripts/utils` | core/home/config/nomarchy-skill/SKILL.md | `kept` |  |
 | `nomarchy-tui-remove-all` | `features/scripts/utils` | core/home/config/nomarchy-skill/SKILL.md | `kept` |  |
 | `nomarchy-tz-select` | `core/system/scripts` | features/desktop/waybar/config/config.jsonc,features/scripts/utils/nomarchy-menu, +2 more | `kept` |  |
-| `nomarchy-update` | `core/system/scripts` | core/home/config/nomarchy-skill/SKILL.md,core/home/config/nomarchy/default/mako/core.ini, +5 more | `kept` |  |
+| `nomarchy-update` | `features/scripts/utils` | core/home/config/nomarchy-skill/SKILL.md,core/home/config/nomarchy/default/mako/core.ini, +5 more | `kept` |  |
 | `nomarchy-update-available` | `features/scripts/utils` | features/desktop/waybar/config/config.jsonc,features/desktop/waybar/themes/summer-day/config.jsonc, +1 more | `kept` |  |
 | `nomarchy-update-firmware` | `features/scripts/utils` | features/scripts/utils/nomarchy-menu | `kept` |  |
 | `nomarchy-update-time` | `core/system/scripts` | features/scripts/utils/nomarchy-menu | `kept` |  |