refactor(lib): remove dead admin-permissions-service.ts

This file exported createAdminUser() but no module imported it. The
canonical createAdminUser lives in src/actions/admin/users.ts and is
called from src/components/admin/{CreateUserModal,UsersPage}.tsx.
The two functions have unrelated shapes (this one took a raw role
string; the real one takes a typed payload with permissions and
handles Neon Auth provisioning).

Detected by grep -rn '@/lib/admin-permissions-service' across src/
with zero hits.

src/lib/admin-permissions-service.ts

@@ -1,76 +0,0 @@
-/**
- * Service-layer admin user creation. Hits the `admin_users` table directly
- * via the shared pg pool. Returns the inserted row (or existing row if the
- * user was already provisioned).
- */
-export async function createAdminUser(
-  userId: string,
-  role: string,
-  brandId: string | null
-): Promise<Record<string, unknown> | null> {
-  const { pool } = await import("@/lib/db");
-  const body = {
-    user_id: userId,
-    role,
-    brand_id: brandId,
-    active: true,
-    can_manage_products: role === "platform_admin",
-    can_manage_stops: role === "platform_admin",
-    can_manage_orders: true,
-    can_manage_pickup: role !== "store_employee",
-    can_manage_messages: role === "platform_admin",
-    can_manage_refunds: role === "platform_admin",
-    can_manage_users: role === "platform_admin",
-    can_manage_water_log: role === "platform_admin",
-    can_manage_reports: role === "platform_admin",
-    can_manage_settings: role === "platform_admin",
-    must_change_password: false,
-  };
-
-  try {
-    const { rows } = await pool.query<Record<string, unknown>>(
-      `INSERT INTO admin_users
-         (user_id, role, brand_id, active,
-          can_manage_products, can_manage_stops, can_manage_orders,
-          can_manage_pickup, can_manage_messages, can_manage_refunds,
-          can_manage_users, can_manage_water_log, can_manage_reports,
-          can_manage_settings, must_change_password)
-       VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15)
-       ON CONFLICT (user_id) DO UPDATE
-         SET role = EXCLUDED.role,
-             brand_id = EXCLUDED.brand_id,
-             active = EXCLUDED.active,
-             can_manage_products = EXCLUDED.can_manage_products,
-             can_manage_stops = EXCLUDED.can_manage_stops,
-             can_manage_orders = EXCLUDED.can_manage_orders,
-             can_manage_pickup = EXCLUDED.can_manage_pickup,
-             can_manage_messages = EXCLUDED.can_manage_messages,
-             can_manage_refunds = EXCLUDED.can_manage_refunds,
-             can_manage_users = EXCLUDED.can_manage_users,
-             can_manage_water_log = EXCLUDED.can_manage_water_log,
-             can_manage_reports = EXCLUDED.can_manage_reports,
-             can_manage_settings = EXCLUDED.can_manage_settings
-       RETURNING *`,
-      [
-        body.user_id,
-        body.role,
-        body.brand_id,
-        body.active,
-        body.can_manage_products,
-        body.can_manage_stops,
-        body.can_manage_orders,
-        body.can_manage_pickup,
-        body.can_manage_messages,
-        body.can_manage_refunds,
-        body.can_manage_users,
-        body.can_manage_water_log,
-        body.can_manage_reports,
-        body.can_manage_settings,
-        body.must_change_password,
-      ],
-    );
-    return rows[0] ?? null;
-  } catch {
-    return null;
-  }
-}