Move device files into new folder

src/util/device.ts

@@ -1,22 +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/.
- */
-
-import React from 'react';
-
-export const DEFAULT_DEVICE = 'default';
-
-let activeDevice = DEFAULT_DEVICE;
-export const getActiveDevice = (): string => activeDevice;
-export const setActiveDevice = (device: string) => {
-    activeDevice = device;
-};
-
-export const ActiveDevice = React.createContext<{ activeDevice: string; setActiveDevice: (device: string) => void }>({
-    activeDevice: DEFAULT_DEVICE,
-    setActiveDevice: () => {},
-});