nintendo/nes_vt369_vtunknown.cpp: Remove unused function

Author: ajrhacker

src/mame/nintendo/nes_vt369_vtunknown.cpp

@@ -131,7 +131,6 @@ class vt36x_state : public vt369_state
 	void vt36x_swap_2mb(machine_config &config) ATTR_COLD;
 	void vt36x_swap_4mb(machine_config &config) ATTR_COLD;
 	void vt36x_swap_8mb(machine_config &config) ATTR_COLD;
-	void vt36x_swap_16mb(machine_config &config) ATTR_COLD;
 	void vt36x_swap_512kb(machine_config &config) ATTR_COLD;
 
 	void vt36x_altswap(machine_config &config) ATTR_COLD;
@@ -482,12 +481,6 @@ void vt36x_state::vt36x_swap_8mb(machine_config &config)
 	m_soc->set_addrmap(AS_PROGRAM, &vt36x_state::vt_external_space_map_8mbyte);
 }
 
-void vt36x_state::vt36x_swap_16mb(machine_config &config)
-{
-	vt36x_swap(config);
-	m_soc->set_addrmap(AS_PROGRAM, &vt36x_state::vt_external_space_map_16mbyte);
-}
-
 void vt36x_state::vt36x_altswap(machine_config &config)
 {
 	VT369_SOC_INTROM_ALTSWAP(config, m_soc, NTSC_APU_CLOCK);