Revert "Support "produced characters" as hotkeys"

This reverts commit bc66d52701.

"useKey" is broken https://github.com/JohannesKlauss/react-hotkeys-hook/issues/1318

src/lib/react-hotkeys-hook/useHotkeys.ts

@@ -1,24 +0,0 @@
-/*
- * Copyright (C) Contributors to the Suwayomi project
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-// oxlint-disable-next-line no-restricted-imports
-import { useHotkeys as orgUseHotkeys } from 'react-hotkeys-hook';
-
-export const useHotkeys = (...args: Parameters<typeof orgUseHotkeys>): ReturnType<typeof orgUseHotkeys> => {
-    const [keys, callback, options, dependencies] = args;
-    return orgUseHotkeys(
-        keys,
-        callback,
-        {
-            preventDefault: true,
-            useKey: true,
-            ...options,
-        },
-        dependencies,
-    );
-};