Fix a couple of unused import warnings

src/arch/aarch64/device/cpu/registers/id_regs.rs

@@ -1,6 +1,6 @@
 //! Functions and bitfield definitions for `ID_AA64*` system registers. (e.g. `ID_AA64ISAR0_EL1`)
 
-use core::{arch::asm, iter};
+use core::arch::asm;
 
 bitfield::bitfield! {
     pub struct AA64Isar0(u64);

src/arch/aarch64/start.rs

@@ -11,9 +11,7 @@ use core::{
 
 use fdt::Fdt;
 
-use crate::{
-    allocator, arch::interrupt, device, devices::graphical_debug, dtb, paging, startup::KernelArgs,
-};
+use crate::{allocator, device, devices::graphical_debug, dtb, paging, startup::KernelArgs};
 
 /// Test of zero values in BSS.
 static mut BSS_TEST_ZERO: usize = 0;

src/arch/riscv64/device/irqchip/mod.rs

@@ -35,7 +35,7 @@ pub unsafe fn init_clint(fdt: &Fdt) {
         .compatible()
         .unwrap()
         .all()
-        .find(|x| ((*x).eq("riscv,clint0")))
+        .find(|x| (*x).eq("riscv,clint0"))
         .is_some());
 
     let clint = Clint::new(clock_freq, &clint_node);

src/arch/riscv64/interrupt/exception.rs

@@ -6,7 +6,6 @@ use crate::{
     arch::{device::irqchip, start::BOOT_HART_ID},
     context::signal::excp_handler,
     memory::GenericPfFlags,
-    panic::stack_trace,
     ptrace,
     sync::CleanLockToken,
     syscall::{self, flag::*},

src/arch/riscv64/start.rs

@@ -6,12 +6,7 @@ use core::{
 
 use crate::{
     allocator,
-    memory::Frame,
-    paging::{PhysicalAddress, PAGE_SIZE},
-};
-
-use crate::{
-    arch::{device::serial::init_early, interrupt, paging},
+    arch::{device::serial::init_early, paging},
     device,
     devices::graphical_debug,
     interrupt::exception_handler,