Kernel: Remove declarations for non-existent methods

Author: https://github.com/AtkinsSJ
Commit: 3cbc0fdbb0
Pull-request: https://github.com/SerenityOS/serenity/pull/17203
Reviewed-by: https://github.com/linusg ✅

Kernel/Bus/PCI/Access.h

@@ -58,9 +58,6 @@ private:
     bool find_and_register_pci_host_bridges_from_acpi_mcfg_table(PhysicalAddress mcfg);
     Access();
 
-    Vector<Capability> get_capabilities(Address);
-    Optional<u8> get_capabilities_pointer(Address address);
-
     mutable RecursiveSpinlock<LockRank::None> m_access_lock {};
     mutable Spinlock<LockRank::None> m_scan_lock {};