Fixed most of the clippy warnings/suggestions.

kernel/src/arch/x86_64/interrupts.rs

@@ -1,6 +1,6 @@
-use lib_ascii::{print, println, println_log};
+use lib_ascii::println_log;
 use lib_serial::serial_println;
-use x86_64::instructions::port::Port;
+// use x86_64::instructions::port::Port;
 use x86_64::registers::control::Cr2;
 use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame, PageFaultErrorCode};
 
@@ -81,7 +81,8 @@ extern "x86-interrupt" fn double_fault_handler(
 }
 
 extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) {
-    use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
+    use pc_keyboard::{layouts, HandleControl, Keyboard, ScancodeSet1};
+    // use pc_keyboard::DecodedKey;
     use spin::Mutex;
     use x86_64::instructions::port::Port;
 
@@ -93,7 +94,7 @@ extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStac
         ))
     });
 
-    let mut keyboard = KEYBOARD.lock();
+    let _keyboard = KEYBOARD.lock();
     let mut port = Port::new(0x60);
 
     let scancode: u8 = unsafe { port.read() };