Revert "Kernel+Userland: Implement support for PS2 scan code set 2"

This reverts commit 61a385fc01.

The commit broke the shift and caps lock key from working.

Kernel/Devices/HID/Definitions.h

@@ -1,32 +0,0 @@
-/*
- * Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#pragma once
-
-#include <AK/Types.h>
-#include <Kernel/API/KeyCode.h>
-
-namespace Kernel {
-
-enum class ScanCodeSet {
-    Set1 = 1,
-    Set2 = 2,
-    Set3 = 3,
-};
-
-struct KeyCodeEntry {
-    KeyCode key_code;
-    u8 map_entry_index;
-};
-
-struct RawKeyEvent {
-    KeyCodeEntry code_entry;
-    u64 scancode { 0 };
-    bool is_press_down { false };
-    bool is_press() const { return is_press_down; }
-};
-
-}