Kernel: Remove stale detect_disks method from PCI IDE controller class

Author: https://github.com/supercomputer7
Commit: 735aa01b58
Pull-request: https://github.com/SerenityOS/serenity/pull/16530
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/FireFox317

Kernel/Arch/x86_64/PCI/IDELegacyModeController.h

@@ -31,7 +31,6 @@ private:
 
     LockRefPtr<StorageDevice> device_by_channel_and_position(u32 index) const;
     void initialize(bool force_pio);
-    void detect_disks();
 
     // FIXME: Find a better way to get the ProgrammingInterface
     PCI::ProgrammingInterface m_prog_if;