Fix two build issues with latest rust version (#736)

- [x] no changelog update needed

agb/src/interrupt.rs

@@ -180,7 +180,7 @@ impl Drop for InterruptInner {
         fn inner_drop(this: Pin<&mut InterruptInner>) {
             // drop the closure allocation safely
             let _closure_box =
-                unsafe { Box::from_raw(this.closure as *mut dyn Fn(&CriticalSection)) };
+                unsafe { Box::from_raw(this.closure as *mut dyn Fn(CriticalSection)) };
 
             // perform the rest of the drop sequence
             let root = unsafe { &*this.root };

agb/src/lib.rs

@@ -205,7 +205,6 @@ pub use {agb_alloc::ExternalAllocator, agb_alloc::InternalAllocator};
 fn panic_implementation(info: &core::panic::PanicInfo) -> ! {
     avoid_double_panic(info);
 
-    use core::fmt::Write;
     if let Some(mut mgba) = mgba::Mgba::new() {
         let _ = mgba.print(format_args!("{info}"), mgba::DebugLevel::Fatal);
     }