KeyboardPreferenceLoader: Remove usage of `DeprecatedFile`

Userland/Services/KeyboardPreferenceLoader/main.cpp

@@ -5,15 +5,11 @@
  */
 
 #include <LibCore/ConfigFile.h>
-#include <LibCore/DeprecatedFile.h>
+#include <LibCore/File.h>
 #include <LibCore/Process.h>
 #include <LibCore/System.h>
 #include <LibMain/Main.h>
-#include <errno.h>
-#include <spawn.h>
-#include <stdio.h>
 #include <sys/ioctl.h>
-#include <unistd.h>
 
 ErrorOr<int> serenity_main(Main::Arguments)
 {
@@ -34,7 +30,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
     TRY(Core::Process::spawn("/bin/keymap"sv, Array { "-m", keymaps_vector.first().characters() }, {}, Core::Process::KeepAsChild::Yes));
 
     bool enable_num_lock = keyboard_settings_config->read_bool_entry("StartupEnable", "NumLock", true);
-    auto keyboard_device = TRY(Core::DeprecatedFile::open("/dev/input/keyboard/0", Core::OpenMode::ReadOnly));
+    auto keyboard_device = TRY(Core::File::open("/dev/input/keyboard/0"sv, Core::File::OpenMode::Read));
     TRY(Core::System::ioctl(keyboard_device->fd(), KEYBOARD_IOCTL_SET_NUM_LOCK, enable_num_lock));
 
     return 0;