remove obsolete files

src/arch/aarch64/kernel/pci.rs

-use alloc::rc::Rc;
-use core::cell::RefCell;
-
-use hermit_sync::InterruptTicketMutex;
-
-// Currently, onbly a dummy implementation
-pub struct VirtioNetDriver;
-
-impl VirtioNetDriver {
-	pub fn init_vqs(&mut self) {}
-
-	pub fn set_polling_mode(&mut self, value: bool) {
-		//(self.vqueues.as_deref_mut().unwrap())[VIRTIO_NET_RX_QUEUE].set_polling_mode(value);
-	}
-
-	pub fn get_mac_address(&self) -> [u8; 6] {
-		[0; 6]
-	}
-
-	pub fn get_mtu(&self) -> u16 {
-		1500 //self.device_cfg.mtu
-	}
-
-	pub fn get_tx_buffer(&mut self, len: usize) -> Result<(*mut u8, usize), ()> {
-		Err(())
-	}
-
-	pub fn send_tx_buffer(&mut self, index: usize, len: usize) -> Result<(), ()> {
-		Err(())
-	}
-
-	pub fn has_packet(&self) -> bool {
-		false
-	}
-
-	pub fn receive_rx_buffer(&self) -> Result<&'static [u8], ()> {
-		Err(())
-	}
-
-	pub fn rx_buffer_consumed(&mut self) {}
-}
-
-pub fn get_network_driver() -> Option<&'static InterruptTicketMutex<VirtioNetDriver>> {
-	None
-}

src/arch/aarch64/kernel/stubs.rs

-use crate::scheduler::CoreId;
-
-pub fn set_oneshot_timer(wakeup_time: Option<u64>) {
-	// TODO
-	debug!("set_oneshot_timer stub");
-}
-
-pub fn wakeup_core(core_to_wakeup: CoreId) {
-	// TODO
-	debug!("wakeup_core stub");
-}
-
-#[no_mangle]
-pub extern "C" fn eoi() {}
-
-#[no_mangle]
-pub extern "C" fn finish_task_switch() {}
-
-#[no_mangle]
-pub extern "C" fn getcontext() {}
-
-#[no_mangle]
-pub extern "C" fn get_current_stack() {}
-
-#[no_mangle]
-pub extern "C" fn makecontext() {}
-
-#[no_mangle]
-pub extern "C" fn setcontext() {}