fix: remove unused isEditMode params and dead clientApi import

Post-merge lint errors from dev — unused variables left behind
after subscription removal.

packages/widgets/src/beszel/_shared/hooks.ts

@@ -2,8 +2,6 @@
 
 import { useMemo } from "react";
 
-import { clientApi } from "@homarr/api/client";
-
 import type { BeszelSystemRow } from "./types";
 
 type SystemRowWithKey = BeszelSystemRow & { _key: string };